AllMineralsRock
Peridot
Peridot is a very popular gemstone composed of magnesium iron silicate. [1]
Peridot: Quick Facts and Characteristics
Some quick facts for Peridot:- Transparency: Peridot is transparent.
- Crystallography: In terms of crystallography, peridot is orthorhombic.
- Luster: In terms of luster, peridot is vitreous (glassy).
- Streak: Peridot streaks colorless.
- Hardness: Peridot's hardness ranges from 6.5 to 7 on the Moh's scale.
- Specific Gravity: Peridot's specific gravity ranges from 3.2 to 4.39.
Peridot: Background and Summary
Peridot is a beautiful green mineral that has been used for centuries in jewelry making. It is a type of olivine mineral and is found in volcanic rocks and meteorites. Peridot is known for its vibrant green color, which is caused by the presence of iron. The mineral can range in color from yellow-green to olive green, and can be transparent or translucent.One of the easiest ways to identify peridot is by its color. It has a distinct green hue that is different from other green gemstones like emerald or jade. Another way to identify peridot is by its hardness. It has a hardness of 6.5-7 on the Mohs scale, which means it is durable enough to be used in jewelry. Peridot also has a high refractive index, which gives it a bright and sparkling appearance.
Peridot has been used in jewelry making for thousands of years. It was a popular gemstone in ancient Egypt, where it was believed to have protective powers. Peridot was also used in medieval Europe as a talisman for protection against evil spirits. Today, peridot is still used in jewelry making, and is often set in rings, earrings, necklaces, and bracelets. It is also used in decorative objects like vases and bowls.
Peridot: Table of Properties
| Attribute | Peridot (src) |
|---|---|
| Transparency | transparent |
| Chemical Formula | (Mg,Fe)2SiO4 |
| Chemical Composition | magnesium iron silicate |
| Specific Gravity | 3.2, 4.39 |
| Hardness | 6.5, 7 |
| Streak | colorless |
| Crystallography | orthorhombic |
| Refractive Index | 1.635, 1.879 |
| Hydrous | No |
| Colors | common: green, yellow, brown sometimes: olive less common: pale, amber, lemon |
| Solubility | Soluble (slowly) in HCl |
| Category | silicate |
| Birefringence | δ = +0.036 |
Peridot: FAQ
Q: Is peridot a rare mineral?A: Peridot is not considered a rare mineral, but high-quality peridot can be expensive.
Q: Can peridot be treated or enhanced?
A: Peridot is not usually treated or enhanced, but some lower-quality stones may be treated to improve their color.
Q: How should I care for my peridot jewelry?
A: Peridot is a relatively hard and durable stone, but it can be damaged by heat and chemicals. To care for peridot jewelry, avoid exposing it to high temperatures and harsh chemicals. Clean it with warm, soapy water and a soft brush, and store it in a soft pouch or box to prevent scratches.
Sources
- Gemological Institute of America. "Peridot." https://www.gia.edu/peridot- Mineralogy Database. "Peridot." https://www.mindat.org/min-3187.html
- Peridot: https://en.wikipedia.org/wiki/Peridot
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