Cotton Green Tourmaline 21.14ct - 13mm Pair
Cotton Green Tourmaline 21.14ct - 13mm Pair
Cotton Green Tourmaline 21.14ct - 13mm Pair
US$ 7,010
21.14ct Green Tourmaline at US$ 332/ct
Certification?
| Weight | 21.14 ct |
| Shape / Cut | Cushion / Fine Step Cut |
| Color | Cotton Green |
| Clarity | IF |
| Treatment | None |
| Origin | Congo |
| Dimensions | 13.15 x 13.11 x 9.69 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
Cotton Green
Indicative tonal range for this colour family. For reference only — screens vary.
This 21.14ct green tourmaline sits in the cotton green range of the green tourmaline colour scale.
Clarity
IF
This 21.14ct green tourmaline is graded IF. Internally Flawless: no inclusions visible under 10x magnification, minor surface characteristics only.
Shape & size
Cushion
13.15 × 13.11 × 9.69 mm
This 21.14ct green tourmaline measures 13.15 × 13.11 × 9.69 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$ 7,010
US$ 332 / carat
Retail price
US$ 15,422
STARLANKA buys rough at source and cuts it in-house in Bangkok, so a stone reaches you without the layers of margin a green 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 21.14ct green 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 green tourmaline natural or lab-created?
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This STARLANKA green tourmaline (SKU TG1792) is a natural, earth-mined green tourmaline. STARLANKA sells only natural gemstones and does not offer synthetic or laboratory-created stones.
Has this green tourmaline been treated?
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This STARLANKA green tourmaline (SKU TG1792) is untreated. It is sold as a natural, untreated green tourmaline, with no heat or enhancement of any kind.
Does this stone come with a certificate?
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This STARLANKA green tourmaline (SKU TG1792) 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 21.14ct cushion green tourmaline?
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This STARLANKA green tourmaline (SKU TG1792) weighs 21.14 carats and measures 13.15 × 13.11 × 9.69 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 green tourmaline (SKU TG1792) 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 green tourmaline?
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This STARLANKA green tourmaline (SKU TG1792) 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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Green Tourmaline Reviews(89)
“Beautiful!”
Verified buyer·Oct 18, 2025
Oct 18, 2025
“Wife loved the stone.”
Verified buyer·Jul 26, 2023
Jul 26, 2023
Verified buyer·Jul 6, 2023
Jul 6, 2023
“Lovely”
Verified buyer·Jul 4, 2023
Jul 4, 2023
“This is beautiful. The color and clarity!”
Verified buyer·Apr 29, 2023
Apr 29, 2023
“Great beautiful stone. Looking forward to buying a 20 carat emerald”
Verified buyer·Apr 15, 2023
Apr 15, 2023
“Beautiful work as always.”
Verified buyer·Mar 12, 2023
Mar 12, 2023
