Tourmaline - Wikipedia
Dispersion: 0.017 [1]: Ultraviolet fluorescence: Pink stones; inert to very weak red to violet in long and short wave [1]: Absorption spectra: Strong narrow band at 498 nm, and almost complete …
Tourmaline: Meanings, Properties and Powers - The Complete …
2019年5月11日 · The name Tourmaline is from the Sinhalese words‘turamali’, which means “unknown gemstones of mixed colors”.. This is the term given to colored crystals that were …
What Is Tourmaline Gemstone | Tourmaline Stone – GIA
Trade name for pink, red, purplish red, and orangy red tourmaline.
The 15 Different Types Of Tourmaline (With Photos) - Rock Chasing
2024年2月3日 · Raw bi-colored dravite photo provided by Weinrich Minerals. A lesser-known type of tourmaline is dravite. It’s typically brown, ranging from light yellow-brown to dark, nearly …
Where And How To Find And Identify Tourmaline In 2025
2025年1月2日 · Uvite photo provided by Saphira Minerals. Uvite rocks its own unique shades as it’s often seen in dark green, brown, or even black. One cool thing about this type is its crystal …
Tourmaline | Properties, Formation, Occurrence - Geology Science
2024年7月1日 · Tourmaline is a fascinating gemstone that is known for its wide range of colors and unique properties. It is a crystalline mineral composed of complex borosilicate compounds …
Tourmaline: Earth's most colorful mineral and gemstone
Colorful tourmaline crystals: A scatter of small tourmaline crystals in pretty colors from Afghanistan, suitable for faceting very small stones. Some of them are bicolor and a few are …