0.80 Ct Natural Loose Tanzanite – Oval Cut Violet Blue

0.80 Ct  Natural Loose Tanzanite – Oval Cut Violet Blue

A 0.80 carat natural tanzanite in a classic oval cut, displaying a violet-blue colour direction — violet leading, with blue as a warm secondary component that shifts and deepens depending on the light source and viewing angle.

At 7.0 × 5.1mm this stone sits in a sweet spot for versatility. It is large enough to read clearly as a centrepiece in a delicate solitaire ring or a simple bezel pendant, and proportioned correctly for standard oval settings without custom fabrication. The 3.0mm depth is well-calibrated for an oval of this footprint — sufficient to develop strong colour saturation through the table without carrying unnecessary weight below the girdle.

The colour direction here is violet-blue — bV in gemmological notation, meaning violet is the dominant tone with blue as the secondary modifier. This is the warmer, more distinctly tanzanite direction: less comparable to a blue sapphire and more its own thing entirely. In natural daylight the violet component is prominent and rich; under incandescent or warm artificial light the stone deepens and the blue-violet interaction becomes more pronounced. This is tanzanite's trichroism at work in a stone of accessible size.

The stone is heat treated — the universal and permanent industry standard for tanzanite, which is extracted from the ground in a predominantly brown to burgundy state and gently heated to release the blue-violet colour present in the crystal structure. Heat treatment in tanzanite is stable, fully accepted by all gemmological bodies, and does not affect long-term durability or value assessment. It is disclosed on this listing as a matter of course.

FGAA certification from the Gemmological Association of Australia confirms the stone's identity, weight, dimensions, and quality to the standard of Australia's peak gemmological body.

Setting this stone

A 7.0 × 5.1mm oval fits standard 7 × 5 oval settings — one of the most widely available calibrated sizes in commercial jewellery findings and custom casting. This means setting options are broad: four-claw, six-claw, bezel, halo, east-west horizontal, or a simple collet pendant mount. For a ring intended for daily wear, a bezel or protective claw setting that covers the girdle is recommended given tanzanite's 6.5 Mohs hardness. For a pendant or earring, all setting styles are appropriate without restriction.

The violet-blue colour direction suits both yellow and white metal. In yellow gold the warm violet component is drawn forward and the stone reads richer; in white gold or platinum the blue secondary takes prominence and the stone reads cooler and more contemporary. Both are legitimate and the choice depends entirely on the setting aesthetic and the wearer's preference.

Our in-house gemmologist is available to discuss custom setting and commission options for this stone. Perth studio appointments and remote consultations are both available.

A note on tanzanite at this size

Sub-one-carat tanzanite is often overlooked in favour of larger stones, but a well-cut 0.80ct oval in strong violet-blue colour is a more compelling piece of material than an oversaturated or poorly proportioned stone of twice the size. Colour evenness, cutting quality, and the visibility of trichroism matter more than carat weight in tanzanite — and this stone delivers on all three within an accessible price point that makes it a practical starting point for a first tanzanite commission or a considered addition to a collector's holdings.