Lab Created Octagon-Step Cut, Hydrothermal Emerald, Lovely Green Colombian Emerald, Octagon-Step Loose Gemstone 8x10mm for Jewelry Making

*Gem Type: Lab Grown Zambia Emeralds
*Color: Vivid Deep Green
*Cut: Excellent
*Shape: Octagon-Step
*Size: 9x11mm
*Carat Weight: 4.0 Carat
*Transparency: Transparent
*Treatment: Lab-Created
*Specific Gravity:2.66-2.69
*Refractive Index: 1.561-1.571
*Hardness: 7-7.5
*Stone Creation Method: Hydrothermal
*Emerald is the birth stone of May