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Crystals, Gemstones & Minerals

Salammoniac is a rare mineral composed of ammonium chloride, NH4Cl. Here, the crystals have grown in a feather-like form with four sets of growth 90 degrees apart.

Close-up photograph of a carved labradorite head (G1750) from the National Gem Collection with mirror. Photo by Chip Clark.

Labradorite - Gem Gallery - Smithsonian Institution

geogallery.si.edu

Tinzenite, a borosilicate with hardness 6.5 - Molinello manganese mine, Val Graveglia, near Chiavari, Genova, Italy.

"Frederic", one of the best known red fluorites! For many one of the best alpine fluorite / smoky quartz combinations in cabinet size! Found by the "cristallier" Frederic Ancey in 1999 at the Grand Montets ridge, Aiguille Verte North Face, Chamonix, Houte Savoi, France. Size: Smoky quartz 9,5 cm wide, the largest fluorite has 4,7cm edge lenght (= diameter 5,6cm) Collection, photo & © Robert Brandstetter