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SKU: 0165010

17.02 carats Natural Blue-purple Tanzanite | Emerald Cut

$15,900.00 USD

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17.02 carats Natural Purplish-Blue Tanzanite emerald cut main view | SARATTI

Description

This natural Tanzanite shows a striking purplish-blue face-up appearance, with saturated blue across much of the stone and richer purple visible through the central body. Its tone is vivid and lively, while the colour balance remains dynamic rather than flat. In the provided views, the stone also displays natural pleochroic variation, shifting between stronger blue and purple impressions as the viewing angle changes.

Fashioned in an emerald cut with an octagonal outline, the gemstone features broad step facets that create organised flashes of light and a clear sense of internal depth. The faceting gives the stone a calm, architectural appearance while still allowing strong directional brightness. This cut also supports the stone’s purplish-blue character well, drawing out both the cooler blue zones and the more purple central notes visible in different positions.

Weighing 17.02 carats and measuring 14.8 × 12.4 × 9.4 mm, this Tanzanite has an impressive scale and substantial face-up presence. Its proportions make it especially suitable for a statement pendant, a brooch, or a carefully protected bespoke ring or other centre-stone design. Because Tanzanite ranks below harder jewellery stones, a protective setting such as a bezel, halo, or guarded prong arrangement is recommended where appropriate.

Details & Care

Gemstone Identity
  • Displays a purplish-blue face-up hue with saturated blue around much of the outline and purple concentration visible through the centre.
  • From different viewing angles, natural pleochroic variation reveals shifting blue and purple tones.
  • Weighing 17.02 carats, the gemstone offers a notably large and impressive presentation.
  • At 14.8 × 12.4 × 9.4 mm, its proportions create a broad face-up outline with substantial depth.
  • Cut in an octagonal emerald-cut outline, the stone shows clipped corners and a balanced rectangular form.
  • Broad step faceting supports orderly light return, visible internal depth and composed reflective movement.
  • The supplied images show a transparent appearance with subtle natural internal character within the gemstone.
  • Heat treatment has been applied to develop the characteristic purplish-blue appearance.
  • Originating from Tanzania, this gemstone represents the single known source of Tanzanite.
  • Ranking 6 to 7 on the Mohs scale, it should be protected from impact, abrasion and sudden temperature changes.
  • Owing to its size and shape, it is well suited to a pendant, brooch or carefully protected bespoke centre-stone setting.
  • Accompanied by a SARATTI Gemstone Identification Report.

Gemstone Specification

Gemstone Type: Natural Tanzanite
Species: Zoisite
Variety: Natural Tanzanite
Carat Weight: 17.02 carats
Shape: Octagonal
Cut: Emerald Cut
Colour: Purplish-Blue
Dimensions: 14.8 × 12.4 × 9.4 mm
Pleochroism: Visible blue-to-purple directional variation
Treatment: Heat Treated
Origin: Tanzania
Certificate: SARATTI

December Birthstone

Tanzanite is recognised as a December birthstone and is associated with the 24th wedding anniversary. Its purplish-blue appearance and single geographic source give it a distinct place within modern coloured gemstones.

Design Invitation

Its purplish-blue colour, emerald-cut outline and substantial scale would suit a statement pendant or a carefully protected bespoke centre-stone design. The Tanzanite may be acquired loose or developed into a bespoke jewel through SARATTI’s atelier.

Consult an Advisor

For guidance in selecting a gemstone or refining your design, a SARATTI advisor is available to assist with thoughtful recommendations and personalized support. CONTACT

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Delivery Time Estimates (once your order has shipped)

  • United States (Duty Paid): 3–5 business days
  • United Kingdom (Duty Paid): ~10 business days
  • United Kingdom (Self-Clearance): 3–5 business days
  • Europe (Duty Paid): ~10 business days
  • Europe (Self-Clearance): 3–5 business days
  • Rest of the World (Self-Clearance): 3–5 business days

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