Elbaite
Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (sodium lithium aluminum borosilicate)
The lithium-rich tourmaline species responsible for nearly all gem tourmaline, occurring in every color of the rainbow.
- Mohs hardness
- 7-7.5
- Color
- All colors: green, pink, blue, red, colorless, multicolored
- Type
- mineral
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Overview
Elbaite is the lithium-rich species of the tourmaline group and the source of nearly all gem-quality tourmaline. Named in 1913 after the island of Elba, Italy, it occurs in a wider range of colors than almost any other gemstone, from pink rubellite and green verdelite to blue indicolite and colorless achroite.
Many famous tourmaline trade names, such as watermelon, Paraiba, and bicolor tourmaline, are color or pattern varieties of elbaite. A single crystal can display multiple colors zoned along or across its length.
Elbaite forms a series with schorl (iron) and is distinguished chemically by lithium and aluminum content.
Formation & geology
Elbaite crystallizes in granitic pegmatites, coarse igneous bodies enriched in lithium, boron, manganese, and other rare elements that escape into late-stage fluids during granite crystallization. Gem crystals grow in miarolitic pockets where there is room to develop clear, well-formed prisms.
The specific trace elements present, manganese for pinks and reds, iron for greens and blues, copper for Paraiba colors, determine the resulting hue. Major sources include Brazil, Afghanistan, Pakistan, Nigeria, Mozambique, Madagascar, and California and Maine in the USA.
Resistant crystals weather out and accumulate in alluvial gem gravels.
How to identify it
Look for prismatic crystals with a rounded triangular (trigonal) cross-section and strong lengthwise striations, key tourmaline features. Hardness is 7-7.5, luster vitreous, streak white, with no cleavage.
Elbaite is strongly pleochroic and often color-zoned, which together with the crystal habit help separate it from quartz, beryl, and apatite. Color alone cannot distinguish elbaite from other tourmaline species; chemical analysis is needed for precise species identification.
In the field the combination of triangular cross-section, striations, vivid color, and conchoidal fracture is diagnostic of gem tourmaline (elbaite).
Uses & significance
Elbaite is by far the most important gem tourmaline, faceted and cut into cabochons in every color for rings, pendants, earrings, and collector pieces. High-value varieties include neon-blue Paraiba, red rubellite, and bicolor watermelon tourmaline.
Well-formed crystals and color-zoned slices are also prized mineral specimens. Its hardness makes cut stones durable for everyday jewelry.
Metaphysically, the different colors of elbaite are linked to corresponding chakras and emotional healing, though these beliefs are not scientifically supported.
Frequently asked questions
What is elbaite?
Elbaite is the lithium-rich species of tourmaline and the source of almost all colorful gem tourmaline, including pink, green, blue, and multicolored stones.
Is elbaite the same as tourmaline?
Elbaite is one species within the larger tourmaline group. Most gem tourmaline is elbaite, but schorl, dravite, and others are also tourmalines.
Why does elbaite come in so many colors?
Different trace elements, manganese, iron, copper, and others, enter the crystal during growth, each producing different colors, sometimes within a single crystal.
Where is elbaite found?
Brazil, Afghanistan, Pakistan, Nigeria, Mozambique, Madagascar, and the USA (California, Maine) are major sources.
Is elbaite valuable?
Yes, especially fine examples like Paraiba, rubellite, and watermelon tourmaline. Value depends heavily on color, clarity, and size.
Elbaite guides
In-depth guides for identifying, valuing, and understanding Elbaite.
