Cool. It's definitely not lapis or larimar as I'm sure you know, but it does have some interesting form to it. Is it something you've spotted locally? I wonder what it could be.
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
Kinda reminded me of Mossy Creek Glassy Furnace Slag or Leland Blue.
With a little research I discovered the Molo Graphite Project, Green Giant Project and the Toliara Mineral Sands Project all of which have active refineries in Toliara, Madigascar.
Start with some basic tests, H, SG, reaction to acids. Do you know anything about exactly where it came from? Any pieces with matrix or associated minerals?
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