Amber
Succinite (fossilized resin)
Organic Mineraloid
Category
Organic (Often Found By Beachcombers)
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Amber
Succinate (Fossilized Tree Resin)
mineraloid
Chert (specifically a nodule with Chalcendony/Agate banding)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Fossilized Sand Tiger Shark Tooth
Carcharias taurus / Striatolamia macrota (mineralized as Hydroxylapatite/Francolite)
sedimentary (fossil)
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Banded Chert
Silicon dioxide (SiO2)
sedimentary
Chert (Smooth River Pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Chert (River Stone/Cobble)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
mineral
Mixed Gemstone and Mineral Collection
Silicon Dioxide (SiO2) based minerals and others
mineral
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper-rich)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (specifically Flint or Common Chert)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Chert Pebble (Jasper/Quartz variety)
Microcrystalline Quartz (SiO2)
sedimentary
Red Chert (Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Dinosaur Skull Fossil (Velociraptor Replica)
Velociraptor mongoliensis fossil specimen in sedimentary matrix
sedimentary
Baroque Pearl (and potentially a small Sapphire/Blue Topaz)
Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.
Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Organic (Biological specimen)
Brachiopod Fossil (Spiriferid)
Phylum Brachiopoda, Order Spiriferida (CaCO3 - Calcium Carbonate)
sedimentary (fossilized organic remains)
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert Pebble
Chert (Silicon Dioxide, SiO2)
sedimentary
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Ambergris
Ambrein-rich Calculus
Organic (Pseudo-geological)
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Brecciated River Cobble)
Silicon Dioxide (SiO2)
sedimentary
Shell Cameo (Sardonyx Shell)
Cassis madagascariensis (Sardonyx shell)
mineral (biogenic silica/calcium carbonate substrate)
Amber
Succinates (fossilized tree resin), approximately C10H16O
organic gemstone
Black Pearl (Tahitian or Irradiated Type)
Organic gemstone (Calcium Carbonate with Conchiolin Binding)
mineraloid
Chert (specifically Red Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
sedimentary
Banded Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Graphite-veined Quartzite
Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)
metamorphic