Metamorphic Or Igneous Alteration

Blue faceted gemstone ring, likely synthetic sapphire or blue topaz

Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)

Quartz-rich breccia or vein quartz with dark inclusions

Milky quartz (SiO₂), likely brecciated and cemented with iron oxides and dark mica/amphibole minerals

Polished brown gemstone, likely jasper or bronzite

Jasper: microcrystalline SiO₂; possible bronzite: (Mg,Fe)SiO₃

Tumbled pale-green stone, possibly serpentine

Unidentified green silicate; serpentine is a tentative visual match

Mixed rock collection

Labeled specimens appear to include iron-rich rock, schist, basalt, serpentinite, and shale

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Tumbled jade-like stone, likely jadeite or nephrite

Jadeite (NaAlSi₂O₆) or nephrite, a fibrous amphibole aggregate

Weathered, iron-stained rock (likely sandstone or breccia)

Indeterminate clastic sedimentary rock; possible ferruginous sandstone or weathered breccia

Milky Quartz

Silicon Dioxide (SiO2)

Unakite

Epidotized Granite

Weathered volcanic rock, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; primarily plagioclase feldspar, pyroxene, and possibly olivine or iron oxides

Soapstone (Steatite) and Quartz mix

Steatite (Mg3Si4O10(OH)2) and Quartz (SiO2)

Faceted yellow gemstone, likely citrine

Citrine (quartz), SiO₂; possibly yellow sapphire or synthetic glass without testing

Green serpentine-rich rock (possibly serpentinite)

Serpentinite, composed chiefly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Likely gray-green soapstone (steatite) fragment

Steatite, a talc-rich rock; chiefly talc, Mg₃Si₄O₁₀(OH)₂

Sapphire (Corundum variety)

Sapphire (Al₂O₃)

Polished blue-gray mineral specimen, likely galena-bearing ore

Galena (PbS), possibly mixed with quartz/calcite and secondary copper minerals

Weathered basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, with possible olivine and iron oxides

Polished/tumbled serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg₃Si₂O₅(OH)₄

Rhodonite

Rhodonite ((Mn2+,Fe2+,Mg,Ca)SiO3)

Altered volcanic rock, possibly andesite

Likely porphyritic andesite or dacite with secondary chlorite/epidote and quartz–calcite veins

Weathered green metamorphic rock, possibly serpentinite or greenstone

Likely serpentinite (serpentine-group minerals) or chlorite/epidote-rich greenschist; exact identification requires testing

Likely basalt (possibly vesicular basalt)

Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine, with iron-titanium oxides

Red Quartz

Silicon Dioxide (SiO2) with Hematite inclusions

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Hematite

Hematite, Iron(III) oxide (Fe2O3)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Chrysotile Asbestos

Chrysotile [Mg3Si2O5(OH)4]

Soapstone

Steatite (Hydrated magnesium silicate)

White Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Tremolite-Actinolite solid solution Ca2(Mg,Fe)5Si8O22(OH)2

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Serpentinite (likely serpentine-rich metamorphic rock)

Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly derived from altered peridotite

Rose Quartz

Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)

Milky quartz vein fragment

Quartz, silicon dioxide (SiO₂)

Weathered mafic rock, likely basalt

Basalt (fine-grained aggregate dominated by plagioclase and pyroxene; identification is visual and uncertain)

Weathered gray-green volcanic rock

Likely basaltic andesite or altered basalt; precise identification requires a fresh surface and testing

Green Spot Jasper (Kiwi Jasper / Sesame Jasper)

Partially altered granitic rock rich in quartz, microcline feldspar, and tourmaline or amphibole inclusions

Quartzite

Quartzite (SiO2)