Calcite Mineral Specimens from Oxbow, New York
The calcite mineral specimens that were once produced at the Oxbow roadcut in
New York state are sometimes both aesthetic and interesting. An unusual
twin habit, referred to in the literature as "nest twins" or butterfly
twins, are rather common at
Oxbow. The specimens included here are outstanding examples of this
material.
OKB-140 Calcite Oxbow, NY Great cluster composed mostly of 2 large
penetration twins (about 3.5 cm each) on thin marble matrix. Good translucence
and internal rainbows. Matrix has graphite and micro quartz. This is one of the
nicest minatures I have. 48$
OKB-141 Calcite Oxbow, NY Minature with a typical crystal and a nice
butterfly twin. Tiny internal rainbows on this matrix specimen. Matrix has
graphite and micro quartz. 22$
OKB-142 Calcite Oxbow, NY Huge complex penetration twin with some internal
rainbows. 45$
OKB-145 Calcite Oxbow, NY Big single crystal with tiny butterfly twin on one
side. 20$
OKB-146 Calcite Oxbow, NY Nice crystal on calcite crystal matrix. 20$
OKA-976 Calcite Oxbow, NY. Big 15 x 10 cm plate of calcites (to 3 cm each)
well spread out on marble matrix. These buff colored calcite rhombs stand up
well off the matrix. Some visible damage where crystals have been cleaved off.
30$
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