• Look beyond blue: Keep glassy blue, green, yellow and mixed-colour stones; rough sapphire may look nearly black until lit from behind.
• Check cleaned edges: Rinse away clay, then use a torch and loupe to inspect translucency, colour bands and fractures.
• Use several clues: Sapphire is dense, very hard corundum. Appearance alone cannot separate every dark stone; save uncertain finds for identification.

• Choose shallow wash: Look for gem-bearing gravel described in the local guide, including gravel resting on clay or weathered bedrock.
• Read each layer: Test gravel and its lower contact separately. Some fields have multiple wash layers; neither sand nor the first clay layer automatically marks the bottom.
• Treat indicators as clues: Black spinel, called black jack, can accompany sapphires. Ironstone or black stones alone do not prove productive ground.

• Test first: Process equal small samples from nearby permitted spots and label the results before committing to more digging.
• Break up clay: Soak sticky wash. Load a manageable amount into coarse and fine nested sieves; avoid packing them full.
• Wash and check: Work the sieves underwater to release mud and smaller gravel. Inspect the coarse stones before setting that fraction aside.
• Settle and flip: Pulse the fine sieve vertically while turning it periodically. Dense stones settle near the bottom; flip squarely onto a clean mat to expose them.
• Inspect everything: Start at the centre, then examine the whole pile. Rewash clumps and recheck rejects while learning.

• Digging: Hand shovel, small pick and labelled buckets.
• Separation: Coarse/fine sieves and washing tub or permitted water access.
• Inspection: Clean mat, tweezers, torch and 10× loupe.
• Keeping finds: Small labelled containers and a sample notebook.

Colour and brightness, inclusions, fractures, size and the material a cutter can retain all matter. Rough weight is not finished gemstone weight.

• Look for metal: Gold is yellow, dense and malleable. In a gently worked pan it tends to remain with the heaviest concentrate.
• Check lookalikes: Pyrite, chalcopyrite and mica can mimic gold. A magnifier helps reveal crystal faces or thin flaky layers.
• Confirm carefully: On a disposable loose grain, gold dents under a metal point; brittle lookalikes crumble or flake. Keep valuable specimens intact.

• Pan natural traps: In known gold-bearing creeks, test accessible bedrock cracks and gravel around boulder bases, without undermining rocks or banks.
• Follow results: Compare equal-sized samples from different traps. Quartz, ironstone and black sand are clues, not proof that a sample contains gold.
• Detect suitable ground: Research nugget-producing ground with lawful access. Panning fine gold and detecting nuggets are different searches; one does not guarantee the other.

• Prepare the pan: Start partly filled. Submerge the material, loosen clay thoroughly and rinse larger stones before removing them.
• Settle the heavies: With the pan level and underwater, shake side-to-side to let dense particles work downward. Re-settle regularly as you reduce the load.
• Wash slowly: Tilt slightly and wash off small amounts of lighter gravel. Finish gently with a little water; save and re-pan tailings while learning.
• Set up the detector: Follow its manual for noise cancellation and ground balance. Use a quiet, stable setting before increasing sensitivity.
• Cover ground methodically: Keep the coil low and parallel, overlap slow sweeps and check repeatable signals from another direction. Recover the target and recheck the hole.

• Panning: Riffled pan, classifier, bucket and wash tub.
• Recovery: Permitted hand scraper, snuffer bottle and vial.
• Detecting: Suitable detector, headphones and nonmetallic recovery scoop.
• Records: Loupe, sample labels and notes on each test location.

Mass, purity and the price a buyer will actually offer matter. Interesting natural specimens may be assessed differently from scrap or bullion; obtain a proper assessment.

• Watch the colour move. Precious opal shows patches or flashes of colour as you turn it under light; an ordinary surface reflection alone is not enough.
• Potch is still opal. It lacks play-of-colour and can be white, grey, black or another colour. Dark potch alone is not precious black opal.
• Check the edges. Rough may hide a narrow coloured seam beneath dull material. Boulder opal can look mostly like brown ironstone.

• Choose approved heaps. Noodling searches discarded material; public access to a tourist heap does not authorise entering nearby claims or digging shafts.
• Match the district. NSW and SA opal fields occur in weathered sedimentary rocks. Lightning Ridge is known for black opal; White Cliffs and Coober Pedy mainly light opal.
• Queensland is different. Around Winton and Quilpie, inspect ironstone fragments for opal-filled cracks. The host rock may be part of the specimen.

• Choose one small patch. Ask which material is available to search; stay away from shafts, steep heap faces and active machinery.
• Scan slowly. Work across the permitted surface in short strips, picking up waxy-looking chips and promising ironstone fragments.
• Rinse, then rotate. Remove loose dust with water and turn each piece through several angles in daylight.
• Inspect wet and dry. Look along edges for colour, sand and cracks; water can temporarily disguise fractures.
• Keep it intact. Label and wrap promising pieces. Let an experienced cutter assess thin seams before grinding or splitting anything.

• Water spray bottle and soft brush.
• White sorting tray and 10× loupe.
• Small padded containers and location labels.
• Closed shoes, hat and drinking water.

Body tone, brightness and pattern of play-of-colour, soundness, transparency and usable thickness affect value. Potch and a gem-quality colour bar are different materials.

• Look for crystal faces. Intact quartz commonly has six-sided prisms and pointed ends; broken fragments may show curved, glassy fractures instead.
• Separate colour varieties. Rock crystal is clear, smoky quartz brown to black, and amethyst purple. A rusty coating does not establish citrine.
• Use several clues. Colour alone can confuse quartz with glass, calcite or fluorite. Retain uncertain pieces for identification rather than scratch-testing your best point.

• Follow local geology. Search authorised weathered pegmatite ground, loose material below known veins, or approved mine dumps where crystals have weathered free.
• Try named public locations. Stannifer Creek is listed for quartz varieties; permitted Harts Range sites include pegmatite dumps with smoky and rose quartz.
• Target amethyst specifically. Purple quartz can line rock cavities or occur in weathered fragments. Ordinary quartz gravel does not mean an amethyst pocket lies underneath.

• Check the target. Ask for a local example and the permitted collecting patch; distinguish loose collecting from permission to excavate rock.
• Walk a short grid. Inspect loose gravel and weathered material for flat faces, points and repeated fragments from the same source.
• Uncover gently. Where permitted, loosen soil around a visible specimen with a small hand tool; never lever against its tip.
• Wash a small batch. Rinse loose material, then spread every sieve fraction thinly. Quartz will not concentrate like dense sapphires in the centre.
• Preserve the specimen. Brush gently, photograph its setting and wrap separately. Leave firmly attached clusters for an authorised, experienced collector.

• Hand trowel and wooden probe, where allowed.
• Small sieve and water container.
• Soft toothbrush and hand lens.
• Gloves, wrapping paper and labelled boxes.

For specimens, intact shape, clarity, colour, damage and overall appearance matter. Many common pieces are collected for enjoyment rather than resale.

• Expect warm colours: Australian rough commonly includes honey, orange and reddish-brown stones; pink, yellow and colourless material also occurs.
• Look at shape and light: Some crystals retain pointed ends; others are rounded chips. Clean them and check lustre, transparency and internal cracks with a loupe.
• Know the distinction: Natural zircon is not synthetic cubic zirconia. Colour and sparkle suggest candidates, but do not prove identification or cutting quality.

• Try sapphire gravels: Zircon occurs with sapphires in eastern Australian alluvial fields. Sample permitted gem-bearing gravel rather than indiscriminate topsoil.
• Use the local profile: Test gravel pockets and their clay or bedrock contact where shallow and accessible; a productive layer varies between fields.
• Recognise a different deposit: At Mud Tank, Zircon Hill supports digging and wet/dry sieving; rounded zircons also occur on the Flats. Follow its mapped collecting area.

• Compare samples: Keep batches separate by location and layer. Record actual zircon finds before processing more.
• Choose wet or dry: Dry-sieve loose, dry material where suitable; soak clay-rich wash before wet sorting. Do not assume every site needs the same method.
• Separate sizes: Inspect both coarse and fine fractions. With wet sieving, settle heavy grains, then turn the sieve onto a clean sorting surface.
• Search methodically: Check the concentrated centre and outer gravel. Lift colourful or glassy chips with tweezers and inspect them against a light background.
• Protect the find: Rinse gently and store promising stones separately. Note fractures before asking a lapidary or gemmologist whether identification or cutting is worthwhile.

• Collecting: Small hand shovel and labelled sample buckets.
• Sizing: Two mesh sizes suited to the local gravel.
• Sorting: White tray or clean mat, tweezers and loupe.
• Care: Torch, soft brush and separate padded containers.

Colour, clarity, size and cutting quality matter. Bright blue retail zircon is commonly heat-treated, so do not expect that appearance in every natural find.

• Look for beryl habit. Preserved crystals can have six-sided prisms and a glassy surface; creek-worn pieces may lose these helpful faces.
• Green is not enough. Emerald is green beryl coloured by chromium or vanadium. Pale green beryl, green glass and other green minerals need distinguishing.
• Inspect colour zoning. Torrington specimens can contain green emerald bands within otherwise pale or colourless beryl. Fractures and inclusions are common.

• Start around Torrington. Permitted SCA fossicking offers a practical route to local beryl-bearing gravels. Ask NPWS or local mineral specialists for current suitable ground.
• Read the host rock. Emmaville–Torrington beryl is associated with granite-contact rocks, quartz–topaz rock and pegmatitic material. These indicate geology, not a guaranteed emerald pocket.
• Separate history from access. Emmaville mines and WA's Poona/Agha Khan and Menzies deposits are geological examples, not automatic public destinations.

• Learn a local specimen. Compare a confirmed rough beryl sample before choosing a permitted creek-gravel or loose-weathered-material patch.
• Take a small sample. Where allowed, collect loose material without damaging rock outcrops or old mine structures.
• Rinse and size-sort. Wash away clay gently, keeping larger pieces as well as the finer sieve fraction.
• Inspect the whole tray. Beryl's density is close to quartz; do not discard everything outside a sapphire-style heavy-mineral centre.
• Keep evidence intact. Turn candidates in daylight, check colour through a lens, record the location and retain surrounding matrix for expert identification.

• Coarse and fine hand sieves.
• Water bucket and light-coloured sorting tray.
• 10× loupe and a small torch.
• Soft brush, padded containers and labels.

Green colour and transparency are central. Fractures, treatment, size and cutting potential also matter; inclusions are common and require individual assessment.

• Know the mineral: Ruby is red corundum; other corundum colours are sapphire. Red-purple rough deserves inspection, but colour alone cannot name it.
• Expect lookalikes: Red zircon, garnet and spinel can be mistaken for ruby. Rubyvale and Ruby Gap names are not evidence that a red find is ruby.
• Keep the evidence: Photograph cleaned stones and retain their location labels. A gemmologist uses several tests; a UV glow or phone photograph is not conclusive.

• Set realistic expectations: Australian gem ruby is uncommon. Documented occurrences include the Barrington/Gloucester district and occasional New England finds; occurrence does not establish public access.
• Target documented wash: At permitted alluvial corundum sites, investigate shallow gravel concentrations rather than smashing random red-stained rock.
• Test the profile: Sample accessible gravel layers and lower contacts separately. Do not assume every sapphire field contains ruby or that one clay layer is the final bottom.

• Learn before digging: Ask an experienced local guide to show genuine rough and common red lookalikes from that field.
• Sample selectively: Start with small labelled batches from known corundum-bearing wash. Compare results before moving more ground.
• Wash gently: Loosen clay and separate coarse from fine gravel. Inspect both fractions instead of discarding all large or small stones.
• Concentrate and inspect: Use the sapphire sieve-and-flip technique: settle dense grains, invert onto a mat, then inspect the entire pile for possible corundum.
• Save, then confirm: Keep uncertain red, pink and purple pieces separately. Seek identification before polishing, heating or paying for faceting.

• Sampling: Small shovel, trowel and clearly labelled buckets.
• Separation: Nested sieves, wash tub and clean sorting mat.
• Identification: 10× loupe, white tray and ordinary torch.
• Records: Camera, notebook and separate specimen containers.

Colour, transparency, inclusions, fractures, size and treatments affect value. A small sound bright stone can be more useful to a cutter than a large opaque fragment.

• Colour: Australian rough is often colourless, pale yellow or pale blue. Brilliant shop-blue is not the colour to expect.
• Shape: Look for glassy, chunky fragments, sometimes with flat faces. Creek-worn topaz can have rounded edges rather than perfect crystal points.
• Confirm: Topaz feels relatively heavy for its size, but appearance and heft are only clues. Keep doubtful quartz-like pieces for expert identification.

• O’Briens Creek, Queensland: Within the mapped area near Mount Surprise, investigate creek and gully gravel, hillwash and old tin tailings.
• Mount Gibson, Queensland: The designated diggings include loose scree and weathered material. Water is scarce, so dry sieving is usual.
• Choose lawful ground: Carry a Queensland fossicking licence and the current area map. Respect excluded claims, leases and residences; check wet-season road access.

• Sample first: Take a small batch of gravel from safe, already exposed wash. Compare nearby samples instead of committing immediately to a large hole.
• Loosen gently: Use hand tools beside promising stones, lifting material into a bucket. Avoid striking crystals directly with a pick or shovel.
• Separate sizes: Dry-sieve manageable batches, coarse then fine. Inspect both retained fractions; clear topaz can disappear among pale quartz and dusty gravel.
• Clean and inspect: Rinse interesting pieces over a bucket using carried water. Spread one layer on a tray, turn each stone and inspect with a loupe.
• Recheck and record: Examine the discard pile before leaving. Bag candidates separately with the sample location; refill disturbed ground and protect finds during transport.

• Digging: Small shovel or hand trowel and a light pick.
• Sorting: Nested coarse/fine sieves, bucket and sorting tray.
• Inspection: 10× loupe, soft brush and washing water.
• Packing: Padded specimen containers, labels, map and drinking water.

Natural colour, clarity, size, fractures and cutting yield affect value. Vivid blue shop specimens are commonly treated and are not a reliable guide to how raw finds will look.

• Colour: Deep red and reddish brown are common, but garnet also comes in orange, green and other colours. A dark pebble may transmit red light.
• Form: Look for rounded grains, chunky crystals with flat faces, or garnets embedded in quartz, feldspar or schist.
• Quality: Backlight clean edges for transparency and cracks. Opaque garnets can make attractive specimens without being suitable for faceting.

• Harts Range West, NT: The declared area has almandine garnet for wet or dry sieving. Check current permit and access requirements.
• Alluvial ground: New England, NSW, has garnet among other alluvial gems. Sample gravel at authorised sites; not every creek is open.
• Crystals in rock: Central Harts Range sites such as Rex Mine have garnet in quartz, feldspar and schist, with some loose on slopes. Confirm the approach permissions; avoid shafts.

• Pick a sample: Start with small batches of loose gravel or weathered material inside the approved area. Keep different patches separate.
• Grade the material: Use nested sieves, retaining each size fraction so tiny dark garnets are not hidden beneath larger stones.
• Remove the dirt: Wash batches in a bucket; with limited water, dry-sieve and rinse selected candidates later.
• Sort in a thin layer: Spread gravel on a tray, turn the stones and shine a torch through clean edges. Save uncertain pieces and recheck the rejects.
• Handle matrix differently: Inspect loose weathered rock for embedded crystals. Where collection is permitted, keep attractive pieces intact, brush gently and label the locality.

• Sampling: Hand trowel, small shovel and labelled buckets.
• Separation: Coarse/fine sieves and a washing bucket.
• Inspection: Sorting tray, torch, 10× loupe and soft brush.
• Field essentials: Padded bags, current area map, permits and ample water.

Identify the variety first. Colour, clarity, crystal condition, size and cutting potential influence desirability; a common red garnet is not priced like a rare variety.

• Shape: Some rough resembles two joined pyramids; other diamonds are rounded, twinned or irregular. Shape alone cannot confirm a find.
• Appearance: Rough may be colourless, tinted or surface-stained. Its appearance differs from a polished jewellery diamond.
• Confirmation: Have candidates checked by a qualified gemmologist. A scratch test, photograph or inexpensive tester alone cannot establish natural-diamond identity.

• Historical Australian ground: Copeton and Bingara, NSW, produced alluvial diamonds. That history does not grant public access to creeks or mines.
• Choose an authorised trip: Ask a local operator or land manager which gravel can legally be sampled. Enjoy the more attainable minerals the site offers.
• Know the exclusions: Argyle is undergoing mine closure and rehabilitation. Do not treat it as a public fossicking site. NT fossicking rules prohibit removing diamonds.

• Set a realistic plan: At an authorised locality, take a small gravel sample and record its location separately. Success is very unlikely.
• Clean gently: Rinse off mud over a bucket and loosen clumps by hand. Do not smash promising stones to see inside them.
• Separate by size: Use nested sieves and keep retained fractions apart. Inspect coarse stones as well as fine material.
• Inspect systematically: Spread one layer on a tray, scan row by row, turn pieces over and use a loupe. Revisit the reject pile before disposing of it.
• Document a candidate: Photograph it with a scale and record its locality. Where removal is lawful, pack separately and arrange professional testing before calling it a diamond.

• Sampling: Hand scoop, labelled bags and notebook.
• Sorting: Nested sieves, clean bucket and contrasting tray.
• Inspection: 10× loupe, torch and phone for scaled photographs.
• Protection: Small padded specimen box, water and current access documents.

Identity, natural or laboratory-grown origin, colour, clarity, weight and possible finished cut all require assessment. Do not apply polished retail prices to unidentified rough.