|Amblygonite||NMNH G10652||Brazil||29.37 ct|
Purchased with funds from the Tiffany & Co. Foundation in 2010.
Transparent amblygonite, commonly colorless to light yellow, is sometimes faceted and used as a gemstone. However, when set in jewelry it is prone to fracture, chipping, and abrasion, as its hardness and toughness are poor. The main sources for gem quality amblygonite are Brazil and the U.S. Other localities include Australia, France, Germany, Namibia, Norway, and Spain. The beautiful blue-green color is what makes this amblygonite rare and unusual and a wonderful addition to the National Gem Collection.