Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Sunstone
Feldspar group (Plagioclase / Oligoclase)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Quartz (Quartzite / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
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).
Mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Bog Iron / Limonite Concretion
Goethite/Limonite mixture (FeO(OH)·nH2O)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Quartz with Actinolite or Tourmaline inclusions
Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2 or Tourmaline group inclusions
igneous
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Fossilized Crinoid Stem Segment
Crinoid (Phylum Echinodermata, Class Crinoidea)
sedimentary
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Quartzite
Quartzite (Metamorphosed Sandstone)
metamorphic
![Lepidolite (in Quartz Matrix) (Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]) — mineral](https://media.rockidentification.com/c0a09dcb-a278-4886-8e0d-c4f8d56aa39b-thumbnail.jpg)
Lepidolite (in Quartz Matrix)
Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]
mineral
Spinosaurus fossil (permineralized bone)
Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)
sedimentary
Green Jasper Pebble
Microcrystalline Quartz (SiO2) with impurities
sedimentary
Blue Quartz
Quartz (Silicon Dioxide) with blue inclusions (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz (Crystal Fragment)
Silicon Dioxide (SiO2)
mineral
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Metamorphic Quartz Arenite
metamorphic
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Obsidian
Volcanic glass (SiO2)
igneous
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral