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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.
Fireworks Obsidian Rough - $5.00/pound
Locality: Mexico

Fireworks Obsidian has wonderful white to colored patterns on a black background. Some portions of Fireworks Obsidian may be porous, but if you cut around these problem areas spectacular gems can be made from it. Note: the uneven hardness of this material makes it unsuitable for knapping.

Sample of Fireworks Obsidian Rough
Cabochon cut from Fireworks Obsidian
Item Number
Description
Weight
Price
Fireworks
Obsidian #1 		Two piece parcel measuring approximately 5" x 2-3/4" to a point x 1-3/4" thick & 4-3/4" x 3-1/2" to a point x 1" thick. SOLD
2.9 pounds
$14.50
Fireworks
Obsidian #2 		Measures approximately 5-1/2" x 4-1/4" x 4" thick.
6.56 pounds
$32.80
Fireworks
Obsidian #3 		Measures approximately 5-1/2" x 4" x 2-1/4" at a peak. SOLD
2.78 pounds
$13.90
Fireworks
Obsidian #4 		Measures approximately 5" x 5" x 3-1/2" along a ridge.
5.50 pounds
$27.50
Fireworks
Obsidian #5 		Measures approximately 7" x 6" x 2-3/4" along a ridge.
10.02 pounds
$50.10
Fireworks
Obsidian #6 		Measures approximately 4" x 4" x 1-3/4" thick. SOLD
2.09 pounds
$10.45
Fireworks
Obsidian #7 		Triangular shape measures approximately 9 x 5 x 2-3/4" to an edge.
6.45 pounds
$32.25
Fireworks
Obsidian #8 		2 piece parcel measures approximately 2-3/4" x 2-1/2" x 2-1/2" to 1" thick & 4" x 2" x 1-1/2" to 3/4" thick.
2.95 pounds
$14.75
Fireworks
Obsidian #9 		Measures approximately 8-1/2" x 4" x 3-3/4" at a peak.
6.55 pounds
$32.75
Fireworks
Obsidian #10 		Triangular shape measures approximately 9" x 6" x 4" to an edge.
8.50 pounds
$42.50
Agate   Alabaster   Alunite   Angelite   Assortments   Aventurine   Cacoxenite   Calcite   Chalcedony   Chrysocolla   Chrysoprase   Coral   Dinosaur Bone   Dinosaur Dung (Coprolite)   Dolomite   Fossil Shell (Coquinite)   Goldstone   Graphic Stone   Howlite   Hypersthene (Bronzite)   Indian Paint Rock   Ivoryite   Jade   Jasper   Jet   Lapis Lazuli   Larimar   Lepidolite   Marble   Meerschaum   Moody Green   Obsidian   Petrified Wood   Pipestone   Printstone   Psilomelane   Pyrite   Quartz   Rhodonite   Rhyolite   Rosetta Stone   Ruby-in-Fuchsite   Ruby-in-Zoisite   Seraphinite (Clinoclore)   Shell   Soapstone   Sodalite   Tiger Eye   Todolite   Travertine   Tumbling Rough   Turquoise  
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