Hematite
stained calcite
Apparently, as this calcite group sat in the pocket, the underlying matrix
actually had a crack down the middle at some point, which allowed what appears
to be an iron-based mineral to leak in behind the crystals, adding some
attractive color to the specimen – then the crack filled in, creating what
looks like a thin “vein” when you look at the back of the matrix
Origin: Tsumeb, Namibia
Sample size: 6 x 4 x 2.5 cm (top), 4.5 x 3.5 x 2.5 cm (middle), 11.5 x
8.5 x 4 cm (bottom)
Origin: Boldut Mine, Cavnic, Maramures, Romania
Sample size: 7.8 x 5.8 x 4 cm
CALCITE IN and FROM FOSSILIZED CLAM SHELLS
Mercenaria Sp. - Pleistocene
Mercenaria Sp. - Pleistocene
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Origin: Ruck’s Pit, Okeechobee County, Florida, U.S.A.
Sample size: 7 x 5 x 4.5 cm (top), 7.5 x 4.5 x 3.5 cm (2nd row), 6 x 4.5 x 4
cm (3rd row), 8 x 3.5 x 3 cm (4th row left 2), 3.8 x 3 x 3 cm (4th row right),
4.8 x 3.8 x 2.8 cm (5th row left 2), 3.8 x 2.8 x 2.6 cm (5th row right), 5 x 3
x 2.3 cm (6th row left), 7.5 x 4 x 3.5 cm (6th row right 2), 5.8 x 5 x 4 cm
(bottom left 2), 3.2 x 3 x 2 cm (bottom right)
Origin: Ruck’s Pit, Okeechobee County, Florida, U.S.A.
Sample size: 12 x 8 x 5 cm (top), 8.5 x 7 x 3.8 cm (2nd row), 8 x 5.8 x 4 cm
(3rd row), 9.5 x 8 x 4.5 cm (4th row), 8.5 x 6.5 x 3 cm (5th row left 2), 9.5
x 8 x 4 cm(5th row right 2), 8.3 x 5 x 4 cm (6th row left 2), 10 x 9 x 6 cm
(6th row right 2), 12 x 8 x 5.3 cm (7th row left 2), 7 x 7 x 5 cm (7th row
right 2), 5.5 x 3.5 x 3.6 cm (bottom left 2), 9.5 x 7 x 3.5 cm (bottom right
2)
Water-clear and lustrous calcite scalenohedron with smaller
aragonite and calcite crystals growing in and out of the crystal.
Origin: Bor Quarry, Dalnegorsk, Russia
Sample size: 5.8 x 1.6 x 0.9 cm
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