Man Made Glass Mineral Simulant

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Strawberry Quartz (or Sunstone / Tumbled Quartz)

Silicon Dioxide (SiO2) with Hematite/Lepidocrocite inclusions

Tumbled amethyst

Quartz, purple variety; silicon dioxide (SiO₂), colored mainly by iron impurities and irradiation

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Polished black mineral or volcanic glass fragment

Indeterminate; possibly obsidian or black tourmaline

Snowflake Obsidian

Volcanic Glass (SiO2 with Cristobalite inclusions)

Milky Quartz

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass)

Quartz (Variety of Rough Mineral Specimens)

Silicon Dioxide (SiO2)

Rounded quartz-rich beach pebble

Likely milky quartz or quartzite (SiO₂)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Amethyst cluster

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Yellow-brown quartz/chalcedony fragment

Quartz, SiO₂; likely microcrystalline chalcedony with iron-oxide staining

Obsidian

Volcanic Glass

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Quartzite or Quartz Vein Material

SiO2

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Snowflake Obsidian

Spherulitic Obsidian (Volcanic Glass with Cristobalite inclusions)

Fluorite

Calcium fluoride (CaF2)

Tumbled rose quartz

Rose quartz (pink quartz), silicon dioxide, SiO₂

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Iron-stained Quartz

Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Quartz (White/Milky Pebble)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)

Obsidian

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

Green Fluorite (Botryoidal/Massive)

Calcium Fluoride (CaF2)

Snowflake Obsidian

Volcanic Glass with Cristobalite Inclusions

Pale blue-gray quartz-rich pebble (tentative)

Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment

Quartz with Matrix

Silicon Dioxide (SiO2)

Pegmatite (Feldspar and Quartz)

Pegmatite (KAlSi3O8 / SiO2)

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Quartz Crystal Cluster / Quartzite

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)