Mineral With Metamorphic Or Igneous Host

Quartz-veined Basalt or Diabase Pebble

Igneous rock with hydrothermal quartz vein

Raw garnet-rich metamorphic rock

Likely garnet-bearing schist or garnetite; garnet-group silicates, commonly almandine (Fe₃Al₂Si₃O₁₂)

Milky quartz cluster

Quartz (silicon dioxide, SiO₂), likely a massive-to-drusy specimen with possible mica inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble (Citrine-colored or Stained Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Probable magnetite-bearing rock

Magnetite (Fe₃O₄), possibly in a fine-grained host rock

Milky quartz

Quartz, silicon dioxide (SiO₂)

Sugilite

KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)

Milky quartz cluster

Quartz (silicon dioxide, SiO₂), likely anhedral to drusy quartz

Weathered quartz-rich mineral nodule

Likely quartz (SiO₂) with iron-oxide staining and possibly feldspar/mica; exact identification requires testing

Blue Sapphire

Corundum (Al2O3)

Emerald in Matrix

Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6

Sapphire

Corundum (Al2O3)

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Greenstone (Altered Mafic Rock)

Greenschist / Meta-basalt

Red garnet cabochon pendant

Likely almandine garnet, iron-rich garnet-group silicate (often approximated as Fe₃Al₂(SiO₄)₃); identification from the image is uncertain.

Gneiss with Quartz Vein

Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz vein fragment

Quartz (silicon dioxide, SiO₂), massive or granular variety

Polished malachite

Malachite, Cu₂CO₃(OH)₂

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂), likely a massive vein-quartz specimen

Milky quartz vein fragment (likely quartz with minor feldspar/mica)

Quartz, SiO₂; possibly associated feldspar and mica

Milky quartz (quartz-rich rock fragment)

Quartz, silicon dioxide (SiO₂)

Sapphire

Corundum (Al2O3)

Milky quartz vein fragment

Quartz, silicon dioxide (SiO₂)

Likely raw mica-bearing mineral fragment

Possibly biotite mica or a biotite-rich metamorphic fragment; identification is limited by the dark, blurred image

Green-speckled pebble, likely epidote-bearing basalt or altered granite

Probable epidote (Ca₂(Al,Fe)₃(SiO₄)₃(OH)) in a mafic or felsic host; exact identification requires testing

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Tumbled quartz-rich pebble

Milky quartz with possible feldspar or mica inclusions (SiO₂-dominant)

Milky quartz-rich rock

Quartz (silicon dioxide, SiO₂), likely with mica or feldspar inclusions

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Red garnet stud earrings (likely garnet)

Garnet group; most likely almandine, Fe₃Al₂(SiO₄)₃. The image alone cannot confirm the stone or whether it is natural.

Gneiss with Quartz Vein

Gneiss containing Quartz (SiO2) filler

Quartz-rich granitic pegmatite fragment

Pegmatite, composed mainly of quartz (SiO₂), feldspar, and mica

Metallic sulfide mineral fragment, likely galena

Galena (lead sulfide, PbS), tentative identification

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-rich breccia or vein quartz with dark inclusions

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

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), likely partially translucent massive quartz

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-rich pegmatitic rock (likely milky quartz with feldspar and dark mica)

Pegmatite; predominantly quartz (SiO₂), with feldspar and biotite/hornblende