Green Grossular Garnet · Oval Cabochon 17×12 mm

Oval green grossular garnet cabochon, 17×12×6 mm, hand-cut in our lapidary workshop. Deep forest green with yellowish-green spots and matrix inclusions make this piece completely unique. Flat back, mirror polished.

Piece Details

This Specific Piece

The cabochon displays a deep, humid forest green with transitional yellowish-green areas and small matrix inclusions with earthy tones. It is completely opaque: the mirror polish does not transmit light but reflects it, giving the surface an intense vitreous luster that contrasts with the complex internal pattern.

The lapidary chose an oval cut to center the most uniform color area. With a 6 mm profile, there is enough material for a closed bezel to hold the stone without reducing its visible mass.

How Green Forms in Grossular Garnet

Grossular is a calcium-aluminum garnet variety (Ca₃Al₂(SiO₄)₃). The green color is due to trace amounts of chromium and vanadium replacing aluminum in the crystal lattice. Massive opaque varieties—sometimes called hydrogrossular or “Transvaal jade”—are formed by contact metasomatism when hydrothermal fluids alter serpentinites or limestones. Unlike translucent, faceted tsavorite, these opaque varieties are the classic material for large-format cabochons with solid color.

Suitable Settings

• Bezel setting (925 silver or other precious metals) — the flat back ensures a stable seat; the closed bezel enhances the deep green against white silver
• Statement rings / Pendants with silver settings — the 17×12 mm dimensions provide presence as a central ring or medallion pendant
• Wire wrap — the flat back facilitates wire wrapping without the need for drilling

Garnet in Lapidary Tradition

Garnet has a jewelry history spanning over two millennia. Romans called it carbunculus for the translucent red varieties. Green varieties were not systematically distinguished until the 19th century, when mineralogists in the Urals cataloged grossular. The name “garnet” comes from the Latin granatum, due to the resemblance of its cubic crystals to pomegranate seeds.

In crystal tradition, green garnet is associated with regeneration, growth, and connection to natural cycles. It is considered the stone of the artisan who works raw material and discovers the form within.

The symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice.

How to Recognize Genuine Green Grossular Garnet

Massive green garnet can be confused with prehnite or nephrite jade. Garnet has a bright vitreous luster under magnification, not the waxy luster of jade. It also does not show the fibrous texture of prehnite. To the touch, it initially feels cool, like any dense silicate. The natural color pattern has irregular spots and gradients; perfect uniformity is a sign of dyed glass or resin.

Frequently Asked Questions

Is the green color natural?

Yes. The color comes from trace amounts of chromium and vanadium in the mineral structure. No detectable treatment. Statement based on lapidary observation; the piece does not include formal gemological certification.

What setting is recommended for this cabochon?

We recommend a closed bezel setting in 925 silver, copper, or brass. The flat back facilitates any type of setting. The goldsmith chooses the technique according to their design.

How do you care for grossular garnet?

Clean with a soft, slightly damp cloth. Avoid strong alkalis, ultrasonic cleaners, and high-temperature steam. More information in the jewelry care guide.

Are the measurements exact?

The indicated measurements (17 × 12 × 6 mm) are for reference. Since it is hand-cut, the tolerance is ±0.5 mm in any dimension.

See also: cabochon collection · lapidary workshop.