A faceted gemstone with a triangular shape, showing a color gradient from olive green to pale yellow, resting on a textured gray stone surface.
Natural green and yellow Tanzanite held in tweezers showing the precision El Toro custom cut and unique geometric faceting.
Loose 3.78 carat untreated green and yellow Tanzanite displayed on hand highlighting its rare natural color and custom El Toro cut.
Natural green and yellow Tanzanite rotating in tweezers displaying the precision El Toro cut, brilliance, and untreated color from Tanzania.
Rotating 3.78 carat untreated green and yellow Tanzanite on hand showing natural color shifts and the custom El Toro cut.
A faceted gemstone with a triangular shape, showing a color gradient from olive green to pale yellow, resting on a textured gray stone surface.
Natural green and yellow Tanzanite held in tweezers showing the precision El Toro custom cut and unique geometric faceting.
Loose 3.78 carat untreated green and yellow Tanzanite displayed on hand highlighting its rare natural color and custom El Toro cut.
Natural green and yellow Tanzanite rotating in tweezers displaying the precision El Toro cut, brilliance, and untreated color from Tanzania.
Rotating 3.78 carat untreated green and yellow Tanzanite on hand showing natural color shifts and the custom El Toro cut.

3.78ct Tanzanite: Green and Yellow Early 20th Century Antique Custom Cut 'El Toro'

$1,417.50
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Specifications:

  • Gemstone: Tanzanite
  • Color: Green, Yellow
  • Weight: 3.78 carats
  • Shape & Cut: Custom Early 20th Century Antique Cut "El Toro"
  • Dimensions (mm): 10.21mm (length) x 12.34mm (width) x 4.53mm (depth)
  • Origin: Merelani Hills, Arusha Region, Tanzania
  • Treatment: None

About This Stone

Most people know tanzanite for its rich violet-blue color, but every so often nature produces something completely unexpected. This 3.78 carat natural green and yellow tanzanite from the legendary Merelani Hills of Tanzania is one of those rare discoveries. Untreated and unlike the traditional heated blue material found throughout the market, this gemstone preserves its original crystal color, offering an earthy blend of olive green, golden yellow, and subtle champagne tones that shift beautifully as light moves across the surface.

What truly sets this gemstone apart is the vintage custom "El Toro" carving. Inspired by the strength and symmetry of a bull's head, this precision design transforms the crystal into a sculptural work of art. Crisp geometric facets create dramatic reflections while emphasizing the stone's natural color zoning and architectural form. It's a cut that immediately stands apart from conventional gemstone shapes and speaks to collectors who appreciate artistry and antiques as much as rarity.

Natural unheated green tanzanite is exceptionally uncommon, making this gemstone a true collector's piece. Combined with its custom faceting and origin from the only known tanzanite deposit in the world, it represents an opportunity to own something few people will ever encounter. Whether displayed in a collection or transformed into a one-of-a-kind custom jewelry design, this gemstone is meant to be appreciated from every angle.

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