Sedimentary Or Metamorphic (Low Grade)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Jasper and Quartzite Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Basaltic Scoria

Scoria (Vesicular Basalt/Andesite)

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Basalt

Extrusive Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)

Spinifex Textured Komatiite

Ultramafic Komatiite (with Olivine Spinifex)

Basalt

Extrusive Mafic Igneous Rock

Basalt

Basalt (Aphanitic Mafic Volcanic)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Amethyst

Silicon Dioxide with Iron impurities (SiO2 + Fe3+)

Shungite

Shungite (carbon-rich Precambrian rock)

Rhodonite in Matrix

Rhodonite (Manganese Silicate) - (Mn2+,Fe2+,Mg,Ca)SiO3

White Sapphire

Corundum (Al2O3)

River Pebbles and Quartz

Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)

Milky Quartz (Water-worn Pebble)

Quartz (Silicon Dioxide, SiO2)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Sapphire

Corundum (Al2O3)

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Diamond

Native Carbon (C)

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Diamond (in a Gold Jewelry Setting)

Carbon (C)

Milky Quartz

Silicon Dioxide (SiO2)

Iron Meteorite

Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)

Smoky Quartz in Matrix (Pegmatite)

Silicon Dioxide (SiO2) with Potassium Feldspar and Biotite mica

Ferruginous Quartz (Stained Quartz)

Silicon Dioxide (SiO2) with secondary Iron Oxide inclusions (Limonite/Hematite)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Quartz

Quartz (SiO₂)

Milky Quartz

Quartz (SiO2)

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Blue Goldstone

Aventurine Glass

Black Onyx

Chalcedony (Silicon Dioxide, SiO2)

Sea Glass

Amorphous Silica (SiO2) with various additives

Hematite

Hematite (Fe2O3)

Muscovite Mica

Muscovite / KAl2(AlSi3O10)(OH)2

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles

Mixed gemstones (primarily Silicon Dioxide - SiO2)

Bismuth

Bismuth (Bi)