Rockman's mineral specimens are hand broken as opposed to being crushed which helps keep cleavage and fracture characteristics intact and provides freshly broken areas for better examination of the specimens. If you are looking for a specimen that is not listed, please contact us; we may have it in stock or we may be able to locate it. Please note that some of our specimens are offered below as 10-packs or 5-packs in resealable bags, or as an individual specimen in a cardboard box or in a resealable bag (as appropriate).
We offers the 3 standard sizes of minerals as illustrated:
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Amazonite - Microcline Feldspar (greenish-blue, massive to cleavable)
- 10 Pack - Small [M030b]
- 10 Pack - Medium [M030c]
- 1 Large Sample [M030d]
Angelite (pale blue gem variety of Anhydrite - ideal for small carvings)
- 10 Pack - Medium [M041c]
- 1 Large Sample [M041d]
Apatite - Green
- 10 Pack - Small [M067b]
- 10 Pack - Medium [M067c]
- 1 Large Sample [M067d]
| Item Number |
Aragonite - White (massive)
- 10 Pack - Small [M070b]
- 10 Pack - Medium [M070c]
- 1 Large Sample [M070d]
Aragonite - Crystal Cluster (orangish-brown to cream)
- 1 Small Sample [M071b]
- 1 Medium Sample [M071c]
Aragonite - Crystal Shape (orangish-brown)
- 10 Pack - Small [M072b]
- 10 Pack - Medium [M072c]
- 1 Large Sample [M072d]
Augite - Pyroxene (olive green to blackish)
- 10 Pack - Small [M075b]
- 10 Pack - Medium [M075c]
- 1 Large Sample [M075d]
Azurite with Malachite (Copper based minerals)
- 1 Medium Sample, mostly Azurite (1.50") [M076b]
- 1 Large Sample, minerals on rock matrix (3.0") [M076c]
Barite - Blue; light blue (crystals in rock matrix)
- 10 Pack - Small [M079b]
- 10 Pack - Medium [M079c]
- 1 Large Sample [M079d]
Barite - White; white to brown (massive to platy)
- 10 Pack - Small [M080b]
- 10 Pack - Medium [M080c]
- 1 Large Sample [M080d]
Bauxite (gray to brown masses, pisolitic texture)
- 10 Pack - Small [M090b]
- 10 Pack - Medium [M090c]
- 1 Large Sample [M090d]
Biotite - Mica group (black, lustrous cleavage plates)
- 10 Pack - Small [M110b]
- 10 Pack - Medium [M110c]
- 1 Large Sample [M110d]
| Item Number |
Calcite - White, Carmel (rhombohedral cleavage)
- 10 Pack - Small [M121b]
- 10 Pack - Medium [M121c]
- 1 Large Sample [M121d]
Calcite - Iceland Spar (rhombohedral cleavage)
- 10 Pack - Small [M125b]
- 10 Pack - Medium [M125c]
- 1 Large Sample [M125d]
Calcite - Green (some rhombohedral cleavage habit)
- 10 Pack - Small [M124b]
- 10 Pack - Medium [M124c]
- 1 Large Sample [M124d]
Calcite - Orange (little to no cleavage discernable)
- 10 Pack - Small [M126b]
- 10 Pack - Medium [M126c]
- 1 Large Sample [M126d]
Calcite - Lt. Blue (some cleavage discernable)
- 10 Pack - Small [M120b]
- 10 Pack - Medium [M120c]
- 1 Large Sample [M120d]
Calcite - Black (shows rhombohedral cleavage)
- 10 Pack - Small [M119b]
- 10 Pack - Medium [M119c]
- 1 Large Sample [M119d]
Calcite - Lt. Yellow Crystal Cluster (Dogtooth) on rock matrix
- 10 Pack - Small [M122b]
- 1 Large Sample, about 3.0" [M122c]
- 1 X-Large Sample, about 4.0" [M120d]
Celestite - Lt. Blue (cleavable, most open geode style)
- 10 Pack - Small [M135b]
- 10 Pack - Medium [M135c]
- 1 Large Sample [M135d]
Chalcopyrite (brassy yellow, in rock matrix; hand specimen is ore sample)
- 10 Pack - Small [M150b]
- 10 Pack - Medium [M150c]
- 1 Large Sample; mineral in matrix rock; ore [M150d]
Chromite (black massive, ore of Chromium)
- 10 Pack - Small [M180b]
- 10 Pack - Medium [M180c]
- 1 Large Sample [M180d]
Chrysocolla (vibrant blue, hydrated copper phyllosilicate, on rock matrix)
- 10 Pack - Small [M185b]
- 10 Pack - Medium [M185c]
- 1 Large Sample [M185d]
Chrysoprase (sea-foam green, variety of quartz chalcedony)
- 10 Pack - Small [M160b]
- 10 Pack - Medium [M160c]
- 1 Large Sample [M160d]
Copper Ore - mixture Azurite and/or Malachite in rock matrix
- 10 Pack - Small [M204b]
- 10 Pack - Medium [M204c]
- 1 Large Sample [M204d]
Copper - Native; hackley, sharp jagged edges (chemical processed for shine)
- 1 Medium Specimen, about 1.25" [M200c]
- 1 Large Specimen, about 1.75" [M210d]
Copper - Nugget; natural but tumbled and chemical processed for shine
- 1 Small Specimen, about 1.0" [M201b]
- 1 Medium Specimen, about 1.25" [M201c]
Dolomite - Pink Crystal clusters
- 10 Pack - Small [M230b]
- 10 Pack - Medium [M230c]
Epidote - (yellowish-green, massive)
- 10 Pack - Small [M238b]
- 10 Pack - Medium [M238c]
- 1 Large Sample [M238d]
Fluorite - Green/Purple (cleavable)
- 10 Pack - Small [M260b]
- 10 Pack - Medium [M260c]
- 1 Large Sample [M260d]
Fluorite - Octahedron crystal (most are light green or clear)
- 1 Small Specimen, about 0.75" [M262a]
Galena (cleavable) - Lead Sulfide; wash hands after handling (Sold Out)
- 10 Pack - Small [M280b]
| Item Number |
Galena (in rock) - Lead Sulfide; wash hands after handling (Limited Supply)
- 10 Pack - Small [M281b]
Garnet - Almandine (gemstone, dark brownish-red)
- 5 Pack - Medium, about 1.25" [M023c]
Garnet - Andradite (gemstone, in rock matrix with other minerals)
- 10 Pack - Small [M024b]
- 10 Pack - Medium [M024c]
- 1 Large Sample [M024d]
Graphite (black, high-grade, foliated, greasy feel) (Limited Supply)
- 10 Pack - Small [M311b]
- 1 Large Sample [M311d]
Gypsum - Alabaster (white to light pink, massive)
- 10 Pack - Small [M320b]
- 10 Pack - Medium [M320c]
- 1 Large Sample [M320d]
Gypsum - Satin Spar (white, fibrous, silky luster)
- 10 Pack - Small [M324b]
- 10 Pack - Medium [M324c]
- 1 Large Sample [M324d]
Gypsum - Selenite (mostly transparent, cleavable)
- 10 Pack - Small [M325b]
- 10 Pack - Medium [M325c]
- 1 Large Sample [M325d]
Gypsum Selenite - Desert Rose; crystal cluster
- 5 Pack - Small, about 1.0" [M220b]
- 5 Pack - Medium, about 1.25" [M220c]
Gypsum - Banded
- 10 Pack - Small [M326b]
- 10 Pack - Medium [M326c]
- 1 Large Sample [M326d]
Halite (mostly clear to orangish; cleavable)
- 10 Pack - Small [M330b]
- 10 Pack - Medium [M330c]
- 1 Large Sample [M330d]
Halite - Salt (massive, clear to whitish; see Sedimentary for Rock Salt)
- 10 Pack - Small [M335b]
- 10 Pack - Medium [M335c]
- 1 Large Sample [M335d]
Halite - Lt. Pink to Peach Cluster (exhibits isometric crystal stucture)
- 1 Large Specimen, about 3.0" [M336c]
- 1 X-Large Specimen, about 4.0" [M336d]
Hematite - Botryoidal (crystal habit like a bunch of grapes)
- 1 Medium Sample, about 1.75" [M339c]
Hematite - Banded (shows layering of red and silver colored hematite)
- 10 Pack - Small [M338b]
- 10 Pack - Medium [M338c]
- 1 Large Sample [M338d]
Hematite - Earthy (red, ochre and massive)
- 10 Pack - Small [M345b]
- 10 Pack - Medium [M345c]
- 1 Large Sample [M345d]
Hematite - Hard (red to dark gray, massive)
- 10 Pack - Small [M346b]
- 10 Pack - Medium [M346c]
- 1 Large Sample [M346d]
Hematite - Specular (black, glistening)
- 10 Pack - Small [M340b]
- 10 Pack - Medium [M340c]
- 1 Large Sample [M340d]
Hornblende (massive with some crystal cleavage) (Sold Out)
- 10 Pack - Small [M350b]
| Item Number |
Hornblende - Prismatic (cleavable)
- 10 Pack - Small [M351b]
- 10 Pack - Medium [M351c]
- 1 Large Sample [M351d]
Ilmenite - Black/Steel Gray - Titanium ore; may have weak magnetism
- 10 Pack - Small [M360b]
- 10 Pack - Medium [M360c]
- 1 Large Sample [M360d]
Kaolin/Kaolinite (white to tan, massive)
- 10 Pack - Small [M379b]
- 10 Pack - Medium [M379c]
- 1 Large Sample [M379d]
Kyanite - Various, blade shapes individual or in matrix
- 10 Pack - Small [M381b]
- 10 Pack - Medium [M381c]
Kyanite - Light Blue (massive, small crystals in matrix) (Limited Supply)
- 10 Pack - Small [M382b]
Lepidolite - micaceous, massive, lavender (secondary source of Lithium)
- 10 Pack - Small [M390b]
- 10 Pack - Medium [M390c]
Lepidolite - Mica group, platy, lavender (secondary source of Lithium)
- 10 Pack - Small [M391b]
- 10 Pack - Medium [M391c]
- 1 Large Sample [M391d]
Limonite (yellow to brown, massive)
- 10 Pack - Small [M400b]
- 10 Pack - Medium [M400c]
- 1 Large Sample [M400d]
Magnetite (black, can show metallic luster, magnetic)
- 10 Pack - Small [M420b]
- 10 Pack - Medium [M420c]
- 1 Large Sample [M420d]
Magnetite - Lodestone - Nature's True Magnet (brownish-black)
- 1 Small Specimen, about 1.0" [M410b]
- 1 Medium Specimen, about 1.50" [M410c]
- 1 Large Specimen, about 2.25" [M410d]
Microcline - Potassium K-Feldspar (pinkish to salmon color, cleavable)
- 10 Pack - Small [M240b]
- 10 Pack - Medium [M240c]
- 1 Large Sample [M240d]
Microcline - Potash Feldspar group (whitish to cream color, cleavable)
- 10 Pack - Small [M435b]
- 10 Pack - Medium [M435c]
- 1 Large Sample [M435d]
Molybdenite (small veins in matrix, ore of Molybdenite)
- 10 Pack - Small [M440b]
- 10 Pack - Medium [M440c]
- 1 Large Sample [M440d]
Muscovite - Mica group (cleavage sheets)
- 10 Pack - Small [M450b]
- 10 Pack - Medium [M450c]
- 1 Large Sample [M450d]
Olivine (coarse-grained Peridot in Basalt matrix) (Limited Supply)
- 1 Large Sample (4") [M465c]
- 1 Large Sample (5") [M465d]
Olivine - Light Green (massive, fine to medium-grained)
- 10 Pack - Small [M460b]
- 10 Pack - Medium [M460c]
Opal - Light Pink (semi-precious gemstone of the silicate mineral family)
- 5 Pack - Small [M467b]
- 5 Pack - Medium [M467c]
Phlogopite - Mica group (brown cleavage sheets)
- 10 Pack - Small [M490b]
- 10 Pack - Medium [M490c]
- 1 Large Sample [M490d]
Plagioclase group - Albite (light bluish-gray), may show twinning
- 10 Pack - Small [M020b]
- 10 Pack - Medium [M020c]
- 1 Large Sample [M020d]
Plagioclase group - Soda-lime Feldspar (bluish-gray, massive, small cleavages)
- 10 Pack - Small [M495b]
- 10 Pack - Medium [M495c]
- 1 Large Sample [M495d]
Plagioclase Labradorite - Calcium enriched Feldspar (can show iridescence, various colors)
- 10 Pack - Small [M496b]
- 10 Pack - Medium [M496c]
- 1 Large Sample [M496d]
Plagioclase Oligoclase (white/cream)
- 10 Pack - Small [M497b]
- 10 Pack - Medium [M497c]
Pyrite (brass-yellow, crystalline to massive)
- 10 Pack - Small [M504b]
- 10 Pack - Medium [M504c]
- 1 Large Sample [M504d]
Pyrolusite (dark silver fibrous mineral on rock matrix, ore of Manganese)
- 10 Pack - Small [M507b]
- 10 Pack - Medium [M507c]
Pyrrhotite - Nickel ore (brassy to bronze, massive)
- 10 Pack - Small [M500b]
- 10 Pack - Medium [M500c]
- 1 Large Sample [M500d]
Quartz - Agate (multi-colored, some banding)
- 10 Pack - Small [M511b]
- 10 Pack - Medium [M511c]
- 1 Large Sample [M511d]
Quartz - Amethyst (geode crystal pieces)
- 10 Pack - Small [M521b]
- 10 Pack - Medium [M521c]
- 1 Large Sample [M521d]
Quartz - Aventurine; sea green
- 10 Pack - Small [M520b]
- 10 Pack - Medium [M520c]
- 1 Large Sample [M520d]
Quartz - Citrine; small individual crystal points (clear/brownish-orange)
- 15 Pack - Small Crystals, 0.75" each [M518b]
Quartz - Citrine; crystal cluster (clear/brownish-orange)
- 1 Medium Sample, 1.25" [M518c]
- 1 Large Sample, 2.25" [M518d]
Quartz - Chalcedony (light blue/gray to smoky, partly translucent, waxy)
- 10 Pack - Small [M522b]
- 10 Pack - Medium [M522c]
- 1 Large Sample [M522d]
Quartz - Chert (cream to white massive)
- 10 Pack - Small [M523b]
- 1 Large Sample [M523d]
Quartz - Clear/White Crystal (single to some double crystals, not cluster)
- 1 Medium Sample, about 1.75" [M510b]
- 1 Large Sample, about 2.50" [M510c]
Quartz - Clear/White Crystal Cluster
- 1 Large Sample, about 2.5" [M510d]
- 1 X-Large Sample, about 3.5" [M510e]
Quartz - Flint (brown to multicolors)
- 10 Pack - Small [M512b]
- 10 Pack - Medium [M512c]
- 1 Large Sample [M512d]
Quartz - Jasper (red to multicolors)
- 10 Pack - Small [M513b]
- 10 Pack - Medium [M513c]
- 1 Large Sample [M513d]
Quartz - Milky (white, massive)
- 10 Pack - Small [M514b]
- 10 Pack - Medium [M514c]
- 1 Large Sample [M514d]
Quartz - Rose (light pink, massive)
- 10 Pack - Small [M515b]
- 10 Pack - Medium [M515c]
- 1 Large Sample [M515d]
Quartz - Rose (best grade, deep pink, crystalline)
- 10 Pack - Small [M516b]
- 1 Large Sample [M516d]
Quartz - Silicified Wood (wood replaced by Silica)
- 10 Pack - Small [M517b]
- 10 Pack - Medium [M517c]
- 1 Large Sample [M517d]
Rhodonite (rose-pink, Manganese oxide veins, tarnishs to black)
- 10 Pack - Small [M508b]
- 10 Pack - Medium [M508c]
- 1 Large Sample [M508d]
Sodalite - Deep Blue (massive, some rock)
- 10 Pack - Small [M530b]
- 10 Pack - Medium [M530c]
- 1 Large Sample [M530d]
Sphalerite (dark brown, massive, small cleavages)
- 10 Pack - Small [M527b]
- 10 Pack - Medium [M527c]
- 1 Large Sample [M527d]
Stibnite - Metallic Gray (crystalline in rock, Antimony Ore, MT)
- 10 Pack - Small [M536b]
- 10 Pack - Medium [M536c]
- 1 Large Sample [M536d]
Sulfur (yellow, massive)
- 10 Pack - Small [M540b]
- 10 Pack - Medium [M540c]
- 1 Large Sample [M540d]
Talc - Gray/Brown (schistose)
- 10 Pack - Small [M550b]
- 10 Pack - Medium [M550c]
- 1 Large Sample [M550d]
Talc - Light Green/Gray
- 10 Pack - Small [M551b]
- 10 Pack - Medium [M551c]
- 1 Large Sample [M551d]
Tourmaline - Black (parts of large crystals, may show twinning)
- 10 Pack - Small [M555b]
- 1 Large Sample [M555d]
Trona (processed into baking soda)
- 10 Pack - Small [M570b]
- 10 Pack - Medium [M570c]
- 1 Large Sample [M570d]
Tungsten Ore - Scheelite & Wolframite in rock matrix
- 10 Pack - Small [M587b]
- 10 Pack - Medium [M587c]
- 1 Large Sample [M587d]
Wavellite - Green, botryoidal, hydrous aluminum phosphate (Willard Mine, NV)
- 1 Small Specimen [M583b]
- 1 Medium Specimen [M583c]
Wavellite - White, botryoidal, hydrous aluminum phosphate (Willard Mine, NV)
- 1 Small Specimen [M584b]
- 1 Medium Specimen [M584c]
Vermiculite (brown cleavage sheets, altered form of Biotite or Phlogopite)
- 10 Pack - Small [M580b]
- 10 Pack - Medium [M580c]
- 1 Large Sample [M580d]