Spear-Cut Warm-Toned Tanzanite Diamond and Ruby Pendant Necklace 1.79tcw 14kt Yellow Gold

This Spear-Cut Warm-Toned Tanzanite, Diamond and Ruby Pendant Necklace centres a custom spear-cut natural tanzanite (1.59ct) displaying the warm/burgundy axis of the stone's trichroism, paired with a 0.07ct straight-baguette diamond and a 0.13ct step-cut ruby, all set in 14kt yellow gold on an 18-inch 0.75mm solid cable chain. Total carat weight is 1.79tcw. The spear cut is a custom geometric shape (elongated with a tapered point), unusual for tanzanite, the cut emphasises length and produces a bold modern silhouette distinct from typical pear, oval, or emerald cuts. Combined with the warm-toned tanzanite centre, the effect is a contemporary cocktail-style necklace rather than a traditional tanzanite piece.

Necklace at a Glance

• Center stone: 1.59ct custom spear-cut natural tanzanite (warm/burgundy axis)
• Accent stones: 0.07ct straight-baguette diamond + 0.13ct step-cut ruby
• Total carat weight: 1.79tcw
• Metal: 14kt yellow gold (purity 585)
• Pendant size: 0.65'' x 0.40''
• Chain: 18'' x 0.75mm solid cable chain (included)
• Cut: Custom spear cut (elongated geometric)
• SKU: TAndCO-0058

About the Tanzanite, Diamond, and Ruby

The 1.59ct centre stone is a natural tanzanite from Tanzania in a custom spear cut, displaying the warm/burgundy axis of tanzanite's natural trichroism. Tanzanite is famously trichroic, the species displays three colours (blue, violet, burgundy) depending on viewing angle and cut orientation. This particular cut and the yellow gold setting both work to emphasise the warm-toned end of tanzanite's natural pleochroism, producing a stone that reads burgundy-violet rather than the more common blue-violet. The accent stones, a 0.07ct straight-baguette diamond and a 0.13ct step-cut ruby, complement the warm centre with white sparkle and deep red contrast respectively. All stones are natural mined gemstones.

About the Spear Cut and Setting

The spear cut is a custom elongated cut with a tapered point, distinctive enough that it reads as a deliberate design choice rather than a standard cut category. The 14kt yellow gold setting (585 purity) holds the spear-cut centre with the baguette diamond and step-cut ruby accents arranged geometrically alongside it, the architectural cut styles (spear, baguette, step-cut) read coherently as a contemporary geometric statement piece. The 18-inch solid cable chain is included.

Why Shop With Treasured & Co.

• ✔ Free domestic shipping on every order, fully insured
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• ✔ Available in standard sizes, complimentary fitting consultations on request
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Custom Cuts in Tanzanite Jewelry

Most commercial tanzanite is cut in standard shapes (round, oval, pear, emerald, marquise, trillion). Custom cuts (spear, kite, hexagon, lozenge, freeform) are uncommon in tanzanite specifically because the cutter must align the cut with the stone's natural pleochroism axes to produce good colour, custom cuts add complexity to that calculation. A spear-cut tanzanite of this size (1.59ct centre stone) is a distinctive choice, the elongated geometric outline gives the stone visual length and reads as contemporary art-deco-influenced rather than classical jewelry. For buyers who want a tanzanite necklace that reads as a one-of-a-kind piece rather than another oval or pear tanzanite pendant, the custom spear cut delivers that distinctiveness.

Frequently Asked Questions

Is the tanzanite natural?

Yes. The 1.59ct spear-cut centre is a natural mined tanzanite from Tanzania. Heat treatment is standard for tanzanite, this stone is treated per industry norms but is not synthetic, lab-grown, or simulant.

Why does this tanzanite look brown rather than blue?

Tanzanite is trichroic, displaying blue, violet, and burgundy depending on cut and viewing angle. This stone is cut and set to emphasise the warm/burgundy axis of tanzanite's natural pleochroism rather than the more common blue-violet axis. Both expressions are gemologically authentic tanzanite, the colour difference is which axis is dominant in the cut, not a different stone or treatment artifact.

What is a spear cut?

A spear cut is a custom elongated gemstone cut with a tapered point, geometrically similar to a marquise cut but typically with sharper angles and more pronounced length-to-width ratio. Custom cuts like spear, kite, and hexagon are uncommon in tanzanite specifically because the cut must align with the stone's pleochroism, this adds technical demand to the cutter's work.

Are the diamond and ruby accents natural?

Yes. The 0.07ct straight-baguette diamond and the 0.13ct step-cut ruby are both natural mined stones.

Is the chain included?

Yes. The 18-inch 0.75mm solid cable chain in 14kt yellow gold is included.