Specimen #2451
Name: Oligoclase
Type: Gem
Locality: Tanzania
Favorite? N
Fluorescent? N
Size: 5.78 mm
Weight: 0.82 ct
Acquired: 2012-07-12
Source: Arkenstone Auction
Label: N
Comment: This rare Feldspar species is not often seen in gems from any locality. It is only found in a few places in the world as clean stones. This gem is virtually eye clean, and has quite a bit of "life" to it for a smaller stone. It has a nice "Square Brilliant" cut, and actually has a very slight greenish overtone. This is confirmed Oligoclase, and not Anorthite or Orthoclase. This is the real deal, so don't miss out.
Minerals: Oligoclase ((Na,Ca)(Si,Al)4O8)
There is one picture on file
M02451-01.jpg: