Watermelon Tourmaline
A variety of Tourmaline Group
Rare
What is Watermelon Tourmaline?
Watermelon Tourmaline is a transparent tourmaline variety characterized by a pink center that is surrounded by a green outer layer, making it look like a watermelon. Due to its beauty and hardness, this is a popular, but affordable gemstone. It is used in the jewelry industry, where it is primarily turned into rings and pendants.
Optical Properties
- Refractive Index
- 1.614-1.666
- Birefringence
- 0.014-0.040
- Optical Character
- Uniaxial negative
- Dispersion
- 0.017
Watermelon Tourmaline Market Value Calculator
Estimate the market value of Watermelon Tourmaline using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Watermelon Tourmaline Localities Map
See where Watermelon Tourmaline is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Green rims on red or pink cores
- Hardness (Mohs)
- 7 - 7.5
- Density
- 2.9 - 3.1 g/cm³
- Streak
- White
- Luster
- Vitreous, Sub-vitreous
- Crystal System
- Trigonal
Chemical Properties
- Chemical Formula
- A(D3)G6(T6O18)(BO3)3X3Z
- Elements
- B, O
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