Peridot

is gem quality olivine. It has become popular as an affordable green gem.

The best hues are yellow-green to green with as little olive as possible. The brightest and best peridot might be described as "lime-green jello". Properties

• Crystal System -Orthorhombic
• Hardness - 6.5 to 7
• Specific Gravity - 3.3 to 3.4
• Refraction - Double
• Refractive Index - 1.65 to 1.69
• Dispersion - .02
• Birefringence - .0036
• Wearability - Good
• Special Care - None