Dravite, often known as brown tourmaline, is the sodium magnesium endmember of the tourmaline mineral family. Unlike its flashier cousins boasting a rainbow of colors, dravite embraces earthier tones, typically ranging from pale to dark brown, sometimes veering towards blackish brown. Occasionally, you might even encounter dravite in shades of yellow, blue, or even greenish hues, adding a touch of unexpected vibrancy.
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| Dravite from Mwajanga, near Komolo, Tanzania Photo: Marin Mineral |
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| Chrome Dravite from from the Commander Mine Nadonjukin Tanzania. Photo: Benjamin DeCamp |
Dravite forms in elongated, striated crystals, similar to other tourmalines, but it can also surprise with shorter, sturdier shapes. While it may not scream for attention like some tourmalines, dravite possesses a unique earthy charm that resonates with mineral collectors and enthusiasts.
Characteristics of Dravite
- Formula - NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
- Color - Pale brown to dark brown,Ā brownish-black,Ā yellow,Ā blue,Ā greenish
- Crystal habit - Elongated,Ā striated crystals,Ā short,Ā sturdier shapes
- Hardness - 7 to 7.5 on the Mohs scale (quite durable!)
- Specific Gravity - 3.03 - 3.18
- Luster -Ā Vitreous, Resinous
- Transparency:Ā Opaque to transparent (depending on the specific variety)
- Crystal System - Trigonal
- Member of - Tourmaline Group
- Name - Named in 1883 by Gustav Tschermak for the river Drau (in Latin, Drave), on which the type locality is situated.
- Type Locality - Dobrova pri Dravogradu, Dravograd, Slovenia
This intriguing gemstone travels the globe, found in locations like Madagascar, Brazil, Sri Lanka, and even the United States. It often cozies up in granitic pegmatites and other igneous rock formations, patiently waiting to be discovered.
While dravite's less flamboyant palette might exclude it from the mainstream jewelry scene, skilled artisans sometimes transform it into cabochons or beads for collectors who appreciate its understated beauty. Beyond aesthetics, dravite holds significance in the realm of metaphysical properties. Some believe it fosters grounding, stability, and a connection to the earth, making it a treasured talisman for those seeking balance and harmony.
Whether you're a seasoned mineral hunter or simply drawn to the wonders of the natural world, dravite offers a unique perspective on the tourmaline family. Its earthy elegance and potential for deeper connection make it a gem worth appreciating.
Dravite Photos
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| Dravite associated with Quartz Photo : Rob Lavinsky & iRocks.com |
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| Dravite associated with Calcite Photo : Rob Lavinsky & MineralAuctions.com |
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| Dravite associated with Magnesite Photo : Rob Lavinsky & MineralAuctions.com |