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Rainbow Calcite ("Onyx") Cutting Rough
Calcite is the gemstone form of calcium carbonate and often erroneously called "onyx". Calcite comes in many patterns and colors. Rainbow calcite has beautiful patterning in various colors and cuts fine cabochons. Calcite is a soft stone, so it is not a good choice for ring stones. Rainbow calcite cuts easily and takes a polish with diamond or tin oxide. Adding vinegar to your oxide polish may help produce a better polish. Mohs hardness 3.
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Rainbow Calcite Rough - $3.50/pound
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Sample of Rainbow Calcite rough. |
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When cut parallel to the bands, you can cut bulls eye cabochons like the example above. |
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Sample Rainbow Calcite cabochon. |
Sample Rainbow Calcite bear carving. |
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Rainbow Calcite#1 |
Triangular shape measures approximately 7" x 4" x 2-1/2". |
4.38 pounds |
$15.33 |
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Rainbow Calcite#2 |
Trianglular shape measures approximately 5" x 4-3/4" x 3-1/2" thick. |
6.45 pounds |
$22.58 |
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Rainbow Calcite#3 |
Measures approximately 6-1/2" x 4-1/2" x 2-1/2" thick |
5.83
pounds |
$20.41 |
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Rainbow Calcite#4 |
Measures approximately 5" x 4-1/2" x 2-1/2 to3" thick. |
3.86 pounds |
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Rainbow Calcite#5 |
Measures approximately 3-3/4" x 4-1/2" x 3" to 2" thick. |
3.85 pounds |
$13.48 |
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Rainbow Calcite#6 |
Measures approximately 6" x 5" x 3" thick. |
6.40 pounds |
$22.40 |
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Rainbow Calcite#7 |
2 piece parcel measures approximately 4" x 2-1/2" x 1" thick and 4" x 2" x 1" thick. SOLD |
2.63 pounds |
$9.21 |
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Rainbow Calcite#8 |
Measures approximately 5" x 3-1/2" x 3" thick. |
3.25 pounds |
$11.38 |
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Rainbow Calcite#9 |
Measures approximately 4" x 3" x 3" thick. SOLD |
3.57 pounds |
$12.50 |
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Rainbow Calcite#10 |
2 piece parcel. Measures approximately 3" x 1-1/2" x 2" thick and 3" x 3" x 1-1/4" to an edge.SOLD |
2.48 pounds |
$8.68 |
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