Bi Colour Tourmaline 8.31ct
Bi Colour Tourmaline 8.31ct
Bi Colour Tourmaline 8.31ct
US$ 6,286
8.31ct Bi Colour Tourmaline at US$ 756/ct
Certification?
| Weight | 8.31 ct |
| Shape / Cut | Rectangular / Emerald Cut |
| Color | Bi Colour |
| Clarity | IF |
| Treatment | None |
| Origin | Mozambique |
| Dimensions | 16.33 x 7.74 x 6.27 mm |
Buy with Confidence
01Natural only
Only natural, earth-mined gemstones — never synthetic or laboratory-created.
Since 1985
A second-generation family gemstone house, cutting and selling from Bangkok.
Described as it is
Hand-selected and described accurately, with any known treatment disclosed.
Secure checkout
Encrypted end to end, so your payment details stay protected.
Anatomy of This Stone
02Colour
Bi Colour
No colour is recorded for this bi colour tourmaline in our catalogue. Ask us and we will describe it for you before you buy.
Clarity
IF
This 8.31ct bi colour tourmaline is graded IF. Internally Flawless: no inclusions visible under 10x magnification, minor surface characteristics only.
Shape & size
Rectangular
16.33 × 7.74 × 6.27 mm
This 8.31ct bi colour tourmaline measures 16.33 × 7.74 × 6.27 mm, shown here at true physical size on most screens. Carat weight describes a gemstone's mass rather than its dimensions, so always check the millimetres before buying.
Price
Our price
US$ 6,286
US$ 756 / carat
Retail price
US$ 13,829
STARLANKA buys rough at source and cuts it in-house in Bangkok, so a stone reaches you without the layers of margin a bi colour tourmaline normally collects between the mine and a retail counter. The price shown is the price — no negotiated tiers.
Retail price is our estimate of what a comparable stone typically costs at traditional retail. It is a comparison figure — not a former price at which this stone was offered.
Certification & Shipping
03Certification
No lab report supplied
This 8.31ct bi colour tourmaline is not currently accompanied by an independent lab report. One can be added before it ships — choose a laboratory from the certification option in the buy box above. Certification is optional: many clients buy on our own description, which stands behind the 14-day return either way.
- GIA
- GRS
- AIGS
- GIT
- ICA GemLab
- GUILD
- AGR
Reports are issued by the laboratory directly and describe the stone independently of us. Our affiliations.
Shipping & returns
Free and fully insured, worldwide
In the box
Sealed gem box, itemised invoice, and the lab report where one accompanies the stone.
Returns
14 days from delivery. We send a prepaid insured label and refund the original payment method.
Voids a return
The stone has been set, the seal broken, or the stone altered or recut.
Dispatched within 1–3 business days. Full detail in our shipping and return policies.
Frequently Asked Questions
04Is this bi colour tourmaline natural or lab-created?
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This STARLANKA bi colour tourmaline (SKU BT0238) is a natural, earth-mined bi colour tourmaline. STARLANKA sells only natural gemstones and does not offer synthetic or laboratory-created stones.
Has this bi colour tourmaline been treated?
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This STARLANKA bi colour tourmaline (SKU BT0238) is untreated. It is sold as a natural, untreated bi colour tourmaline, with no heat or enhancement of any kind.
Does this stone come with a certificate?
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This STARLANKA bi colour tourmaline (SKU BT0238) is not currently accompanied by an independent lab report. A report from GIA, GRS, AIGS, GIT, ICA GemLab, GUILD or AGR can be added before the stone ships.
What size is a 8.31ct rectangular bi colour tourmaline?
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This STARLANKA bi colour tourmaline (SKU BT0238) weighs 8.31 carats and measures 16.33 × 7.74 × 6.27 mm. Carat weight describes a gemstone's mass rather than its dimensions, so two stones of equal weight can differ in face-up size depending on shape and cut depth.
How much does shipping cost?
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STARLANKA ships this bi colour tourmaline (SKU BT0238) free of charge and fully insured worldwide, with no minimum order value. Orders are dispatched within 1–3 business days: 2–4 business days in transit to the United States by international express courier, 3–7 business days elsewhere internationally, and 1 business day within Thailand by local express courier.
Can I return this bi colour tourmaline?
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This STARLANKA bi colour tourmaline (SKU BT0238) can be returned within 14 days of delivery for a refund to the original payment method, provided it has not been set into jewellery, had its security seal broken, or been altered or recut. STARLANKA provides a prepaid, insured return label.
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Bi Colour Tourmaline Reviews(20)
Verified buyer·Nov 7, 2022
Nov 7, 2022
“Beautiful!”
Verified buyer·May 24, 2022
May 24, 2022
Verified buyer·May 22, 2022
May 22, 2022
“Absolutely gorgeous!”
Verified buyer·May 12, 2022
May 12, 2022
“Les pierres sont sublimes et rapport qualité prix IMBATTABLE. De plus livraison extrêmement rapide . Merci pour votre disponibilité et gentillesse”
Verified buyer·Mar 24, 2022
Mar 24, 2022
“Dreamy!”
Verified buyer·Mar 5, 2022
Mar 5, 2022
Verified buyer·Jan 3, 2022
Jan 3, 2022
