Beautiful crafted night sky inlay of two Yeis, buttes and moon in turquoise, pink coral, spiney oyster, malachite, lapis and opal(probably lab opal) on back jet ground.  Created ca 1980's by Eugene Balone.  It has initals S/S skewed not on same line on back...not sure if collaborative piece with another artist not listed in hallmark books.  Happy to send more photos on request. 3.5" x 2.25"