Small post earrings w spiny oyster shell

Navajo handcrafted post earrings in sterling silver and genuine purple spiny oyster shell. The small round shells are mounted in a simple setting.They have large backings adn are light weight and easy to wear. Stamped with the word "sterling". 

Measurements: 5/16" x 5/16"

Shell: Spiny Oyster Shell Living Spondylus shells are, indeed, very spiny, but the polished product looks very smooth the most used Spondylid Bivalve shell colors include orange, reds, and purples and may include distinct striations and color variations.Purple Spiny Oysters grow in deeper water, making them more difficult to find and harvest.