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Adamite on Limonite
Adamite on Limonite
Ojuela Mine, Mapimi, Durango, Mexico
Garnet var. Hessonite
Garnet var. Hessonite
Jeffrey Mine, Asbestos, Quebec, Canada
Corundum Var. Sapphire
Corundum Var. Sapphire
Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka
Corundum Var. Sapphire
Corundum Var. Sapphire
Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka
Spinel (rough and cut)
Spinel (rough and cut)
Mogok, Sagaing District, Mandalay Division, Burma (Myanmar)
Tourmaline var. Uvite with Magnesite and Quartz
Tourmaline var. Uvite with Magnesite and Quartz
Brumado, Bahia, Northeast Region, Brazil
Boytroidal Opal

Boytroidal Opal

sold
Locality
Durango, Mexico
Minerals
Opal
Dimensions
5.0 x 3.8 x 2.9 cm
Size class
Miniature
SID
OPAL8

This comes from a recent discovery of a small-scale mining operation around Durango, Mexico. Some of the pieces I looked at still had roots on them, indicating a deposit relatively close to the surface. The opal itself is remarkably clear and intact. The fluorescence is extreme under both long wave and short wave (short wave pictured). 

This piece has crystallized on a brownish chalcedony matrix. It comes mounted on a black acrylic base. It's in great shape, without any dings. 

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