Howieite
4.48 ct.
5 Sided Cut
13.00 x 9.40 x 6.10 mm
y99410

Howieite
Is an Iron Sodium Manganese Aluminum Magnesium silicate with formula Na(Fe++,Mn++)10(Fe,Al)2Si12O31(OH)13 . A quite complex structure of this new in the market stone.
It comes from Laytonville Quarry,Laytonville,Mandocino Co. California.