Mineral | Tourmaline (Dravite) |
---|---|
Chemistry | NaMg3Cr6Si6O18(BO3)3(OH)3OH |
Color | Green - Vivid Green |
Refractive Index | 1.624 - 1.644 |
Birefringence | 0.018 - 0.040 |
Specific Gravity | 3.06 |
Mohs Hardness | 7.0 - 7.5 |
Chrome Tourmaline, a rare and stunning gemstone with a unique green color, is highly coveted by collectors and jewelers alike. Here's an in-depth look at Chrome Tourmaline, including its attributes, value, sources, properties, colors, and care:
Mineral | Tourmaline (Dravite) |
---|---|
Chemistry | NaMg3Cr6Si6O18(BO3)3(OH)3OH |
Color | Green - Vivid Green |
Refractive Index | 1.624 - 1.644 |
Birefringence | 0.018 - 0.040 |
Specific Gravity | 3.06 |
Mohs Hardness | 7.0 - 7.5 |
Chrome Tourmaline is highly valued for its rare and vivid green color, which is attributed to the presence of chromium. The gem's value is determined by factors such as color intensity, clarity, size, and overall quality. Prices can range from $100 to $1,500 per carat, with bluish-green hues often commanding higher prices.
The vivid green color of Chrome Tourmaline is attributed to trace amounts of chromium in its composition. While most Chrome Tourmalines are pale green, some can display bright and intense green hues with hints of blue or purple.
Chrome Tourmaline is primarily found in Africa, particularly in Nigeria and Zimbabwe. There are also significant deposits in Brazil. The gem is known for its rarity, making it a sought-after stone.
Chrome Tourmaline is renowned for its hardness (7-7.5 on the Mohs scale) and vivid colors. It has a high refractive index, which results in exceptional sparkle and brilliance. Some specimens may exhibit color zoning and a cat's-eye effect, adding to their uniqueness.
Chrome Tourmaline jewelry is durable but should be handled with care to avoid physical damage. Regular cleaning with warm, soapy water and a soft cloth is recommended to remove dirt and oils. Store your Chrome Tourmaline jewelry separately in a soft cloth pouch or jewelry box to prevent scratching when not in use.