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Obsidian Rough
Obsidian comes in many types. Rainbow and color sheens produce unusual cabochons and knapped items. The color is the result of light play in the flow layers of the volcanic glass. Although obsidian has a reputation of being difficult to polish, we have found that if the stone is ground through successively finer grits and the stone isn't heated too much during the polishing stage, that a high polish can be obtained with cerium oxide, or diamond. Mohs hardness 5 to 5.5.
Starry Night Obsidian Rough - $5.50/pound
Locality: Mexico

Starry Obsidian has wonderful white to colored spots and patterns on a black background. The surface of Starry Night Obsidian is a little crackly, but it isn't that noticable because it takes a good polish. Cuts easily and polishes well with diamond. Note: the crackly nature of this material makes it unsuitable for knapping.

Sample of Starry Night Obsidian Rough
Cabochon cut from Starry Night Obsidian
Item Number
Description
Weight
Price
Starry Night
Obsidian #1 		Measures approximately 10" x 5" x 4" at a ridge thick. SOLD
9.60 pounds
$52.80
Starry Night
Obsidian #2 		Measures approximately 5-1/2" to 8-1/2" x 6" to 9" x 1-3/4" to 3" thick. SOLD
10.86 pounds
$59.90
Starry Night
Obsidian #3 		Measures approximately 6" x 6-1/2" x 3-1/2" to 4" thick.
14.04 pounds
$77.22
Starry Night
Obsidian #4 		Measures approximately 5-1/2" x 4-1/2" to a point x 2-3/4" thick. SOLD
4.85 pounds
$26.68
Starry Night
Obsidian #5 		Measures approximately 4" x 6-1/2" x 1" to 2-1/2" thick. SOLD
6.01 pounds
$33.06
Starry Night
Obsidian #6 		Measures approximately 7" x 6-1/4" x 4-1/2" to 1" thick SOLD
8.00 pounds
$44.00
Starry Night
Obsidian #7 		Measures approximately 6" x 7" x 2" to 3-1/2" thick. SOLD
9.88 pounds
$54.34
Starry Night
Obsidian #8 		Measures approximately 4-1/2" x 5-1/2" x 3" to 4-1/2" thick.
11.25 pounds
$61.88
Starry Night
Obsidian #9 		Measures approximately 5" x 4" to 8-1/2" x 1" to 2-1/2 thick
10.35 pounds
$ 56.93
Starry Night
Obsidian #10 		Triangular shape measures approximately 9-1/2 to 6-1/4" to 3-1/2" x 4-1/2 to 1-1/2" thick.
8.60 pounds
$47.30
We also have SLABS of this material.
Agate   Alunite   Angelite   Apache Gold   Assortments   Blue Willow Stone   Calcite   Chalcedony   Chrysocolla   Chrysoprase   Coral (Fossilized)   Dinosaur Bone   Dinosaur Dung (Coprolite)   Dolomite   Fossil Shell (Coquinite)   Goldstone   Graphic Stone   Hypersthene (Bronzite)   Indian Paint Rock   Jade   Jasper   Lapis Lazuli   Lepidolite   Mookate   Obsidian   Petrified Wood   Picasso Marble   Printstone   Psilomelane   Quartz   Rainbow Pyrite   Rhyolite   Ruby-in-Fuchsite   Seraphinite (Clinoclore)   Serpentine   Sodalite   Tiger Eye   Todolite   Tumbling Rough   Turquoise  
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