Faceting gemstones - the pinwheel.

I cut a piece of clear obsidian in the pinwheel design.
i kind of have my doubts as to if its really obsidian but the dealer that sold it said it was. Usually obsidian is not clear
Hardness 5.5 mohs
R. I. 1.45 -1.55
Specific gravity 2.35 - 2.60

Faceting diagrams i use can be found at these websites:
www.Facetingdiagrams.org
www.pinterest.com
www.rockhounds.com
www.usfacetersguild.org
www.gemologyproject.com

Supplies and equiptment i use :
www.kingsleynorth.com
www.rockpeddler.com
www.johnsonbrotherslapidary.com

My gemstones and jewelry can be purchased here:
www.etsy.com Gemsbymbk

pinwheel.