Absolutely gorgeous stones!  Large nuggets of White Buffalo Turquoise (magnesite).

Sterling Silver Fish Hook earwires w/coil

Sterling Silver Daisy beads

White Buffalo Turquoise (magnesite)

Earrings hang apprx. 1 1/4"

In color, magnesite is typically white, but ranges from colorless to gray or tan.  It often has brownish matrix. Magnesite is often dyed to resemble howlite and much-pricier turquoise.  It is very difficult to distinguish this enhanced magnesite from real turquoise with matrix. 

Magnesite is said to assist in creative visualization, help bring peace in meditation and stimulate passion. It is also believed to help strengthen the bones and teeth. Magnesite is found around the world, including much of Europe, Africa, Brazil, China, Korea and the U.S.A.   

This is 'not' to be confused with Sacred Buffalo Turquoise which is mined in the Dry Creek Mine in Nevada.  Sacred Buffalo Turquoise is expensive and rare.