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Obsidian Slabs
Obsidian is volcanic glass. It often has flow lines that create interesting effects. Flow Obsidian, also known as Midnight Lace, has striking translucent, colorless flow lines against a black background. Snowflake obsidian has a light snowflake pattern in a black background. Gold sheen and silver sheen obsidians display gold and silver chatoyance when polished, rainbow obsidian displays different colors, etc. Obsidian has a reputation for being difficult to polish. Usually the reason for difficult polishing is that coarse grits can create a fairly deep fracture zone that doesn't come out when the stone is cut at finer grits. Another problem is obsidian doesn't polish well if it gets too hot. So, if you don't use super coarse grinding wheels and if you keep your polishing wheel slow and wet, good results will easily be obtained.

Example of the sheen effect when viewed at an angle.
 Item number: Slab882R - Flow Obsidian (Midnight Lace) Slabs - $7.00
Locality: probably from Oregon

 

Three slab parcel measures approximately:
2 at 9/32" thick and
1 at 9/32 to 5/16" thick.

Ruler is in inches.

 Item number: Slab884R - Flow Obsidian (Midnight Lace) Slabs - $7.00
Locality: probably from Oregon

Three slab parcel measures approximately:
3 at 9/32" thick.

Ruler is in inches.

 Item number: Slab823R - Snowflake Obsidian Slabs - $5.00
Locality: Utah

 

Three slab parcel measures approximately:
2 at 3/16" thick and
1 at 7/32 to 3/16" thick.

Ruler is in inches.

 Item number: Slab824R - Snowflake Obsidian Slabs - $5.00
Locality: Utah

 

Three slab parcel measures approximately:
2 at 3/16" thick and
1 at 7/32" thick.

Ruler is in inches.

We also have ROUGH GOLD SHEEN OBSIDIAN.
Assortments     Agates    Alunite    Aventurine    Calcite/Travertine    Cacoxenite    Charoite    Chrysocolla    Clam Chowder Stone    Copper Secondaries    Coprolite    Crinoid Marble    Dalmatian Stone    Dinosaur Bone    Dolomite    Fossil Coral    Fossil Stone    Goldstone    Hypersthene    Indian Paint Rock    Jade    Jaspers    Lapis Lazuli    Lepidolite    Malachite    Maw Sit Sit    Montana Bark    Mookaite    Nunderite    Obsidians    Petrified Wood    Pietersite    Pink Elephant Stone    Pink Lace Rosetta Stone    Printstone    Quartz    Rhodochrosite    Rhodonite    Rhyolites    Ruby in Fuchsite    Ruby in Zoisite    Selected Materials    Seraphinite    Serpentine    Sodalite    Thulite     Tiffany Stone    Tiger Eye    Tiger Iron    Turquoise    Unakite    Variscite    Youngite   
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