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| 75 |
Malachite on Copper
Malachite on Copper
Southwest Mine, Bisbee, Cochise County, AZ
Clay Williams Collection CW-1021
4 by 3 by 3 in
Value: $200.00
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| 76 |
Rutile in Natural Quartz Crystal (A)
Rutile in Natural Quartz Crystal (A)
Alchuri, Shigar Valley, Baltistan, Northern Areas, Pakistan
Quartz crystal (SiO₂) with hollow casts after anhydrite (CaSO₄ - a sulfate mineral) crystals. Two have remnants of chlorite (a silicate mineral - usually greenish in color).
Rutile is the mineral form of titanium dioxide (TiO₂).
3.5 by 2 by 1.5 in
Value: $80.00
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| 77 |
Carved Quartz Crystal (B) (100)
Carved Quartz Crystal (B)
Hand-carved clear Quartz crystal (SiO₂) around a light-colored matrix with iris’ (iridescence or rainbow reflections of light along microscopic fractures, twinning, or air pockets), dark inclusions (likely hematite - an iron oxide mineral - FeO₂), and pale blue inclusions (unknown).
6 by 4 by 3 in, 2.65 lbs
Value: $212.00
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| 78 |
Natural Quartz Crystal (C)
Natural Quartz Crystal (C)
Unusually shaped clear Quartz crystal (SiO₂) with natural terminations (not carved or polished). Displays the nearly two-dimensional tabular crystal structure on one side and less common nearly triangular crystal structure (often called Trigonal Quartz) on the other. Triangular-looking indentations at the base show where other crystals once grew. Pieces like this one are also known as Lemurian Quartz and originate in Columbia – the sides are alternately very clear and strongly striated (parallel ridges perpendicular to crystal growth – length of the crystal). Natural quartz crystals generally have 6 faces at termination and 6 sides. It’s especially rare to see both tabular and trigonal growth habits on the same crystal.
7.5 by 2.5 by 2 in
Value: $200.00
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| 79 |
Natural Quartz Crystal (D)
Natural Quartz Crystal (D)
Double terminated – primary clear Quartz crystal (SiO₂) – meaning both ends of the crystal have natural points. Many iris’ (iridescence or rainbow reflections of light along microscopic fractures, twinning, or air pockets), dark inclusions (likely anthraxolite – black carbon (C) deposits) with some forming phantoms – silhouettes of earlier crystal growth, showing the crystal termination when the deposit occurred and followed by more growth, encasing the deposit as the inclusion we now see inside the crystals. Phantoms that point in different directions than the current termination indicate the crystal was once oriented in a different direction.
6 by 4 by 3 in
Value: $130.00
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