Organic (Geological Relative)

Obsidian

Volcanic Glass (SiO2 with impurities)

Scoria (Lava Rock)

Scoria

Quartz (specifically Milky or Clear Chunk)

Silicon Dioxide (SiO2)

Obsidian

Volcanic Glass (SiO2)

Quartzite

Quartzite (primarily SiO2)

Greenstone

Greenschist (Metamorphosed Mafic Rock)

Polished malachite tower

Malachite, Cu₂CO₃(OH)₂ (basic copper carbonate)

Granite

Felsic Intrusive Igneous Rock

Banded Calcite

Calcium Carbonate (CaCO3)

Obsidian

Obsidian (principally SiO2)

Rose Quartz

Crystalline Silicon Dioxide with trace Titanium/Manganese/Iron (SiO2)

Desert Rose

Selenite Rose (Gypsum: CaSO4·2H2O)

Quartzite

Quartzite (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Green fluorite (likely)

Fluorite, calcium fluoride (CaF₂)

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Dark gray basalt or andesite cobble

Fine-grained mafic to intermediate volcanic rock; commonly plagioclase feldspar, pyroxene, and possibly olivine

Obsidian

Volcanic Glass (SiO2)

Obsidian

Obsidian (Volcanic Glass, SiO2)

Slate

Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Flower Agate

Chalcedony (cryptocrystalline Quartz) with Spherulite inclusions; SiO2

Obsidian

Obsidian (Volcanic Glass)

Snowflake Obsidian

Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)

Tumbled turquoise

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Obsidian

Obsidian (principally SiO2)

Quartz (Milky or Iron-Stained)

Silicon Dioxide (SiO2)

Pink Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Quartz Crystal (specifically a small Clear Quartz point)

Silicon Dioxide (SiO2)

Gold Sheen Obsidian

Volcanic Glass (SiO2 + Fe3O4 / Gas Inclusions)

Scoria (Lava Rock)

Scoria (highly vesicular extrusive igneous rock)

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Coquina

Bioclastic Limestone

Bumblebee Jasper

Fibrous Calcite with Arsenic and Sulfur Inclusions

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Granite

Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Coquina

Biogenic Limestone (mostly Calcium Carbonate, CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Vesicular Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)