Skip to main content
eBay
Write a guide |  
Sort by:
81 guides found in Fine Jewelry






  • Sapphire (Corundum)
  • by 
  • Sapphire (Corundum)Color: Multicolor Crystal structure: Trigonal Composition: Aluminum oxide Hardness: 9 Sapphire:All gem quality corundum that is not red is called sapphire, yet this name is popularly...
  • 10 of 11 people found this guide helpful


  • Citrine
  • by 
  • Citrine Color: colorless to golden yellow variety Crystal structure: Trigonal Composition: Silicon dioxide Hardness: 7 Citrine is the yellow or golden yellow variety of quartz. The yellow coloration due to the...
  • Tags: Citrine
  • 9 of 9 people found this guide helpful


Select template