Organic Gemstone (Not A Rock Or Mineral)

Amber

Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)

Kunzite (Spodumene)

Spodumene (LiAlSi2O6)

Chert (Common Opal/Agatized Rock)

Microcrystalline Quartz (SiO2) with potential Chalcedony/Opaline silica

Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Shale

Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)

Amber (possibly polished or rough amber)

Natural fossil resin; not a mineral, with variable organic composition dominated by polymerized terpenes

Unknown dark mineral fragment

Indeterminate; possibly a dark silicate mineral or slag-like geological fragment

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cement)

Fossilized Brain Coral

Diploria labyrinthiformis (Fossilized)

Possible fossilized bone or tooth fragment

Indeterminate fossilized vertebrate material; mineralized hydroxyapatite replaced or coated by silica/carbonate

Amber

Succinite (specifically for Baltic amber; fossilized tree resin)

Rose Quartz

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

Multi-stone gemstone ring

Likely faceted blue topaz or synthetic blue stone with clear stones, possibly cubic zirconia or diamond; metal setting appears silver-colored alloy

Kidney Stone

Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)

Mixed polished gemstone and mineral collection

Primarily quartz varieties (SiO₂), plus probable aventurine, rose quartz, amethyst, agate, jasper, serpentine, feldspar, and possibly dyed or man-made glass pieces

Rhodochrosite Pebble

MnCO3 (Manganese Carbonate)

Cobaltoan Calcite / Pink Dolomite (Possible)

Cobaltoan Calcite: (Ca,Co)CO3; Pink Dolomite (or Thulite): CaMg(CO3)2 or Mn-Dolomite / (Thulite: Mn2+3Al2(Si2O7)(SiO4)O(OH))

Petrified Wood

Silicified Wood (SiO2)

Milky quartz with iron staining

Quartz (SiO₂), likely iron-oxide-stained

Petrified Wood

Silicified Wood (Permineralized organic matter, głównie $SiO_2$)

Chert (specifically Flint)

Microcrystalline Quartz (SiO2)

Agate (Polished Cabochon Slice)

Silicon Dioxide (SiO2)

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Septarian Nodule

Septarian Concretion (Calcite, Aragonite, and Limestone)

Variscite in Matrix (often traded as Wardite or Cryptocrystalline Variscite)

Variscite (AlPO4·2H2O)

Dalmatian jasper beads

Commercially “Dalmatian jasper”; commonly spotted, silica-rich rock sold as jasper, though many specimens are feldspar-rich rock rather than true jasper (microcrystalline quartz).

Shale

Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)

Biotite gneiss (probable)

Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar

Amber

Succinates (Fossilized Tree Resin)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Banded Agate

Silicon Dioxide (SiO2)

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

Yellow Quartz

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3)

Polished Baltic amber with insect inclusion

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin; likely succinite

Clear Quartz (Faceted)

Silicon Dioxide (SiO2)

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

Quartz Fragment

Silicon Dioxide (SiO2)

Amber (possibly copal)

Fossilized plant resin; amber is organic resin, commonly dominated by polymerized terpenoids

Natural gemstone and mineral collection

Mixed specimens, including turquoise, tiger’s eye, amethyst, fluorite, pyrite, garnet, rose quartz, lapis lazuli, obsidian, rhodonite, red corundum, labradorite, calcite, lepidolite, sodalite, apatite, and others

Yellow Chalcedony (Carnelian / Agate Pebbles)

Silicon Dioxide (SiO2)

Rose Quartz

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