Mineral (Evaporite)

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Howlite

Howlite, Ca₂B₅SiO₉(OH)₅

Selenite tower

Selenite (transparent to translucent gypsum), CaSO₄·2H₂O

Gypsum (selenite)

Gypsum, CaSO₄·2H₂O; likely a translucent, bladed selenite crystal

Fibrous gypsum (selenite/satin-spar variety)

Gypsum, CaSO₄·2H₂O

Gypsum (selenite/alabaster variety)

Gypsum, CaSO₄·2H₂O

Selenite (gypsum crystal)

Gypsum — calcium sulfate dihydrate, CaSO₄·2H₂O

Howlite

Howlite (Ca₂SiB₅O₉(OH)₅)

Howlite

Howlite (Ca2B5SiO9(OH)5)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Blue-green calcite/aragonite specimen

Likely calcite (CaCO₃), possibly aragonite; exact identification requires testing

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Himalayan Pink Salt

Halite (NaCl) with iron oxide inclusions

Barite Rose

Barium Sulfate (BaSO4)

Hematite Rose

Hematite (Fe2O3)

Tumbled howlite (probable)

Howlite, Ca₂B₅SiO₉(OH)₅

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Tumbled yellow calcite

Calcite (calcium carbonate, CaCO₃)

Calcite specimen

Calcite (calcium carbonate, CaCO₃), likely botryoidal or drusy calcite

Howlite (White Buffalo Turquoise)

Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5

Gypsum (selenite/alabaster variety)

Gypsum, CaSO₄·2H₂O

Satin Spar

Fibrous Gypsum (CaSO4·2H2O)

Halite

Halite (Sodium Chloride, NaCl)

Dyed pink tumbled stone, possibly howlite or magnesite

Likely dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); the photo is insufficient for confirmation

Himalayan salt (rock salt)

Halite (sodium chloride, NaCl)

Selenite (satin spar gypsum)

Gypsum, CaSO₄·2H₂O; fibrous variety commonly called satin spar

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Halite

Halite (Sodium Chloride, NaCl)

Dyed green howlite beads (likely)

Howlite, Ca₂B₅SiO₉(OH)₅, artificially dyed green

White Howlite (likely)

Howlite, Ca₂B₅SiO₉(OH)₅

Likely selenite (gypsum) crystal

Gypsum, CaSO₄·2H₂O; selenite is its transparent-to-translucent crystalline variety

Selenite (gypsum) crystal

Gypsum, CaSO₄·2H₂O; transparent-to-translucent variety known as selenite

Raw honey calcite

Calcite (calcium carbonate, CaCO₃)

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Polished blue copper mineral, likely chrysocolla or dyed howlite

Chrysocolla: hydrated copper phyllosilicate, approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; visual identification is uncertain from the image

Tumbled blue stone, likely dyed howlite or magnesite

Howlite (Ca₂B₅SiO₉(OH)₅), possibly magnesite (MgCO₃), artificially blue-dyed

Honey calcite (orange calcite)

Calcite, calcium carbonate (CaCO₃)

Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Pink tumbled stone, likely dyed howlite or magnesite

Most likely magnesite (MgCO₃) or howlite [Ca₂B₅SiO₉(OH)₅], artificially dyed pink; exact identification requires testing.

Howlite and Tree Agate

Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Agate/Quartz)

Gypsum crystal cluster (selenite)

Gypsum, CaSO₄·2H₂O; likely a radiating selenite crystal formation