17.31ct Sunset Tourmaline rough, table view

17.31ct Sunset Tourmaline rough, close-up detail

17.31CT Sunset Tourmaline Faceting Rough | Uncut Gemstone

Name: 17.31CT Sunset Tourmaline Faceting Rough
Brand: Jackson's Gems
SKU: UwHEG42QcXc
Price: 138.48 USD
Availability: InStock

$138.48

17.31CT Sunset Tourmaline rough from Nigeria. This eye clean stone features peach and pink colors.

1 in stock

SKU: UwHEG42QcXc Categories: Tourmaline, Sunset Tourmaline

Technical Specifications & Gemological Properties

Specifications for 17.31CT Sunset Tourmaline Faceting Rough
Carat Weight	17.31CT
Dimensions	18.73 × 12.28 × 7.48mm
Origin	Nigeria
Color	Peach (AB axis)
Clarity Grade	Eye Clean
Gem family	Tourmaline
Variety	Sunset Tourmaline
Secondary color	Pink (C axis)
Recommended shapes	Emerald
Refractive Index	1.62–1.64 ^†
Hardness (Mohs)	7–7.5 ^†
Optic Character	Doubly refractive, uniaxial (−), birefringence 0.018–0.020 ^†
Pleochroism	Moderate to strong (dichroic) ^†
Specific Gravity	3.02–3.26 ^†

† Typical reference value for tourmaline; individual stones vary.

How to orient and cut this rough — Lapidary Guide

Description

17.31CT Sunset Tourmaline Rough is a high-quality piece of facet rough from Nigeria. The stone exhibits peach color across the AB axis and pink color along the C axis. It is eye clean with dimensions of 18.73×12.28×7.48mm. Due to the rough dimensions and clarity, it is best suited for an emerald cut.

17.31CT Sunset Tourmaline Rough Specifications

Lapidary notes: Clean rough; Open C-axis

Cutting Notes

To achieve the peach color face-up, the table must be cut parallel to the c-axis. The C-axis is open, allowing for precise orientation during preforming. The rough is clean and lacks significant inclusions, making it an ideal candidate for a rectangular emerald cut that maximizes the available weight and length.

Sunset Tourmaline is a durable gemstone with a hardness of 7 to 7.5 on the Mohs scale. Toutmaline can be heat sensitive and brittle, so avoid excessive pressure during the grinding process.

Cutter’s tip: With the C-axis open, you can easily verify the peach color before you begin removing significant weight.

Every stone is filmed on video before it is listed, so what you see is the stone you get. For background on Sunset Tourmaline, see the GIA Gem Encyclopedia. Browse more facet rough from Jackson’s Gems.

Questions About This Sunset Tourmaline Rough

How does the color change in Sunset Tourmaline based on orientation?

Sunset Tourmaline is pleochroic. In this specific stone, the peach color is visible when looking across the c-axis, while the pink color is visible along the c-axis.

Is this Sunset Tourmaline rough suitable for a step cut?

Yes. The eye clean clarity and the flat dimensions of the rough make it highly suitable for step cuts like the emerald cut.

What should I be cautious of when polishing Sunset Tourmaline?

Avoid overheating the stone during the final polishing stages. Excessive heat can cause color shifts in certain tourmaline varieties.

Does this stone have visible inclusions?

No, this rough is rated as eye clean, meaning there are no inclusions visible to the naked eye.

Which axis should be used for the table to show peach?

The table should be cut parallel to the c-axis to display the peach color.

Reviews

There are no reviews yet.

Be the first to review “17.31CT Sunset Tourmaline Faceting Rough | Uncut Gemstone”