Lemon Tourmaline

Lemon Tourmaline is a trade name for yellow elbaite in a bright, citrusy lemon-to-canary color. The yellow is generally caused by manganese; the manganese-rich yellow end-member of the elbaite series is the mineral tsilaisite, and many vivid yellow tourmalines are manganese-rich elbaite.

Clean, strongly saturated yellows are relatively scarce, making fine lemon tourmaline a cheerful collector and jewelry stone.

It belongs to the lithium-rich elbaite group, crystallizing in the trigonal system with the prismatic, lengthwise-striated habit characteristic of tourmaline.

Lemon tourmaline crystallizes in lithium- and manganese-rich granite pegmatites. The late, boron-rich fluids of a granitic melt fill pocket cavities where gem elbaite grows, and manganese imparts the yellow coloration; titanium can also contribute to some yellow tones.

The brightest 'canary' yellows are associated with high manganese (the tsilaisite-rich composition), notably from East African deposits. Some yellow stones are heat treated to clarify color.

Sources include Malawi, Tanzania, Madagascar, Brazil, Nigeria, and Zambia, with Malawi and Tanzania well known for vivid canary-yellow material.

Look for a bright yellow body color, hardness 7-7.5, vitreous luster, and white streak. Pleochroism may produce subtle differences in yellow intensity as the stone is rotated.

Rough prisms show lengthwise striations and rounded triangular cross-sections; strong birefringence can double facet edges in larger clean stones.

Lemon tourmaline can resemble yellow beryl (heliodor), citrine, or yellow sapphire. Citrine is quartz with weaker birefringence; sapphire is far harder and denser. Refractometer readings near 1.62-1.64 with strong birefringence confirm tourmaline and separate it from beryl and quartz.

Lemon tourmaline is a faceted gemstone valued for its bright, sunny color, used in rings, pendants, and earrings and effective in white or yellow metal settings. Its hardness suits everyday wear.

Vivid canary stones are uncommon and attract collectors; manganese-rich (tsilaisite-type) material is also of mineralogical interest.

Metaphysically, yellow tourmaline is linked to confidence and the solar plexus chakra, a spiritual rather than scientific attribute. Any heat treatment should be disclosed by the seller.