From: An Phu Mine, Luc Yen, Yen Bai Province, Vietnam
Size: 10.0 x 7.9 x 5.9cm
Weight: 440g
Here is a giant spinel crytal on a marble matrix. The spinel crystal is 4.9cm on its front edge, and on the top-back of the specimen you can see a smaller cluster of spinel crystals resting on the marble. No damage, just natural etching of the spinel crystal.
The specimen comes on a custom Greenstone Mineral Base.