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Acanthite
Acanthite
Imiter, Atlas Mountains, Morocco
Corundum var. Sapphire
Corundum var. Sapphire
Potanino Mine, Ilmen Mountains, Russia
Quartz Var. Rose
Quartz Var. Rose
Lavra da Ilha Pegmatite, Taquaral, Itinga, Aracuai, Minas Gerais, Brazil
Corundum Var. Sapphire
Corundum Var. Sapphire
Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka
Zoisite Var. Tanzanite
Zoisite Var. Tanzanite
Arusha, Merelani, Tanzania
Tourmaline Var. Elbaite
Tourmaline Var. Elbaite
Kunar Province, Afganistan
Boytroidal Opal

Boytroidal Opal

sold
Locality
Durango, Mexico
Minerals
Opal
Dimensions
2.9 x 2.5 x 1.5 cm
Size class
Thumbnail
SID
OPAL9

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 is a neat miniature, where the opal seems to have "percolated," up on the chalcedony matrix. Mounted on black acrylic base. Pictures show both sides.

Without damage.

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