Crystalline quartz amethyst comes in various colors from pale purple to deep purple and sometimes reddish. Color: purple, violet, dark purple, purple-white Streak: White Luster: vitreous (glass-like) Cleavage: None Refractive index: 1.54-1.55 Mohs Hardness Scale: 7...
Amber is the hardened resin of ancient trees. This organic substance is most well-known for the incredible inclusions of insects that can be found within it. People have been making amber jewelry for over 10,000 years. Color: Yellow, red, orange, brown, cream, or...
Agate is a variety of chalcedony that exists in many colors and is often commercially dyed. Agate is distinguished by having multiple colors. Agates are translucent. Color: Variable Streak: White Luster: Waxy-Flat Cleavage: None Refractive index: 1.540 – 1.543...
We need a number of tests to recognize a real gemstones. And these tests are performed by gemological devices. Note that Gemology is slightly different from mineralogy. A gemologist can tell a real gem from a fake gem and can also tell what kind of treatment has...
