- Pack Weight: 2 lb (950 g) lot of rough black obsidian in irregular pieces 1.18-2.2 in (3-5.5 cm); volcanic glass formed from magma, opaque jet black with possible sheen on fracture faces
- Raw State And Care: Stones arrive with thin dust coating; rinse in cool water and pat dry to reveal glossy surface; edges are naturally sharp, handle with gloves during knapping or tumbling
- For Tumbling And Knapping: Start with 60-grit silicon carbide for tumble polish; sharp conchoidal fractures make it suited for flint-knapping practice, arrowhead blanks and cabochon preforms
- Uses: Specimen collection, wire wrapping, resin inlay, vase filler, altar decor and meditation spaces; 2 lb yields dozens of palm pieces or 5-6 larger display chunks
- Color And Authenticity: Natural obsidian is opaque black, not painted or dyed; slight translucency on thin edges is normal; if a piece shows cobalt blue sheen it is still obsidian variant, not sodalite
8 reviews for 2lb Rough Black Obsidian Crystal Rocks for Tumbling Knapping | Volcanic Glass 1.18-2.2In, Unpolished Sharp Edge, Soak Off Dust, Mohs 5-5.5, Wire Wrap Specimens Reiki Decor
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Bwest –
Very good value and pieces can be sharp
Bwest –
Great sizes. Was glad to see not too small. Resealable pouch glad to get and a piece of obsidian that is cobalt blue. I presume it is obsidian.maybe something else like lapis or sodalite .thank you.
GooB –
Great for theprice
Stella Kay Moor –
Super cute. But these are man made. Not real or from a volcano. 100% man made.
jwild –
BEAUTIFUL, SHINY, ROUGH NATURAL BLACK OBSIDIAN STONES, AND YOU GET A LOT OF THEM. YOU DEFINITELY GET YOUR MONEYS WORTH WHEN YOU BUY THESE FIREBOOMOON BLACK OBSIDIAN STONES. TWO POUNDS GETS YOU A WHOLE LOT OF BEAUTIFUL, SHINY, VARIOUS SIZES OF BLACK OBSIDIAN STONES. I HAVE BOUGHT THESE BLACK OBSIDIAN STONES FOR GIFTS FOR PEOPLE, AND I HAVE BOUGHT THEM FOR MYSELF. THEY COME WELL WRAPPED AND A LITTLE DUSTY, NOT MUCH DUSTY. SO YOU NEED TO WASH THEM OFF TO GET THE SMALL AMOUNT OF DUST OFF THEM.
Aaron Thompson –
The obsidian pieces were decent sized, and you get a lot for the price. They are all solid black, glossy, and beautiful pieces of unpolished, raw obsidian. Exactly what I needed.
Cindy Griewe –
We wanted this for some practice with knapping. It works just fine. Some of the pieces are a little bit small.
Trever –
So cool. Exactly what I expected. Nice specimens. Really helps my kids understand what obsidian actually is besides a block. Just bought for coolness, not a rock specialist.