This pendant has a large chunk of White Buffalo in it that is gonna get some peoples attention for sure. Sterling silver chain measures 20"inches long Pendant measures 3"inches tall with bale and 1? No marks but tested as sterling silver great addition to your collection?? White Buffalo is a beautiful white stone with fine black spider web or kind of a blotchy matrix.Sometimes you will also see brownish black matrix as well. White Buffalo is formed from the minerals Calcite and Iron. White Buffalo is only found in one mine is near Tonopah Nevada. It is mined by Danny and Dean Otteson, which classified White Buffalo as a turquoise as it is a similar hard stone as turquoise; the only difference being that it lacks copper. It is questioned at times by definition because turquoise contains copper aluminum phosphate, which is what gives turquoise its blue color. White Buffalo has no copper and no blue color. Otteson notes that, like turquoise, it lies in veins surrounded by black chert. "Until someone can prove differently, we're going to call it white turquoise from the White Buffalo mine", Otteson says. This will continue to be debated for coming ages but, in the end, it is a beautifully bold stone that makes a statement in its black and white colors and so rare to be only found in one area in the world.