Indicolite Blue Tourmaline 20.79ct - 15mm
Indicolite Blue Tourmaline 20.79ct - 15mm
Indicolite Blue Tourmaline 20.79ct - 15mm
US$ 5,888
20.79ct Blue Tourmaline at US$ 283/ct
Certification?
| Weight | 20.79 ct |
| Shape / Cut | Square / Scissor Cut |
| Color | Blue / Indicolite |
| Clarity | IF |
| Treatment | Unheated |
| Origin | Africa |
| Dimensions | 14.56 x 14.53 x 10.64 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
Indicolite · Blue
Indicative tonal range for this colour family. For reference only — screens vary.
This 20.79ct blue tourmaline shows a Indicolite blue, the trade name used for this part of the blue tourmaline colour range.
Clarity
IF
This 20.79ct blue tourmaline is graded IF. Internally Flawless: no inclusions visible under 10x magnification, minor surface characteristics only.
Shape & size
Square
14.56 × 14.53 × 10.64 mm
This 20.79ct blue tourmaline measures 14.56 × 14.53 × 10.64 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$ 5,888
US$ 283 / carat
Retail price
US$ 12,954
STARLANKA buys rough at source and cuts it in-house in Bangkok, so a stone reaches you without the layers of margin a blue 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 20.79ct blue 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 blue tourmaline natural or lab-created?
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This STARLANKA blue tourmaline (SKU TB0020) is a natural, earth-mined blue tourmaline. STARLANKA sells only natural gemstones and does not offer synthetic or laboratory-created stones.
Has this blue tourmaline been treated?
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This STARLANKA blue tourmaline (SKU TB0020) is unheated — it has not been heat treated. STARLANKA discloses any known treatment or enhancement on every stone it sells.
Does this stone come with a certificate?
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This STARLANKA blue tourmaline (SKU TB0020) 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 20.79ct square blue tourmaline?
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This STARLANKA blue tourmaline (SKU TB0020) weighs 20.79 carats and measures 14.56 × 14.53 × 10.64 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 blue tourmaline (SKU TB0020) 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 blue tourmaline?
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This STARLANKA blue tourmaline (SKU TB0020) 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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Blue Tourmaline Reviews(20)
“Faultless 😊. I am a Gemologist and bespoke Diamond jewellery Designer based in Scotland. Working on an unusual commission I required a large flawless rich green Tourmaline. Fortunately Starlanka had such a gemstone. My client had to approve of this purchase and to achieve this approval fine resolution videos were provided. From my initial enquires through the very helpful nature of Starlanka I made this purchase On receipt of this gemstone the gemologist in me tested the Gem to confirm it’s authenticity. Delighted with my purchase and I can now progress with this commission unhindered. Starlanka have a phenomenal collection of Gemstones available and I have no hesitation in thoroughly recommending this Company to anyone trade or otherwise who requires fine natural Gemstones I will most certainly be working with Starlanka as one of my network of Suppliers Regards to all potential purchasers Roy W Macdonald FGA DGA”
Verified buyer·Aug 13, 2023
Aug 13, 2023
“Beautiful”
Verified buyer·Oct 26, 2022
Oct 26, 2022
“Gorgeous gemstone, with highly desired color and cut. Highly recommend!!”
Verified buyer·Jul 6, 2022
Jul 6, 2022
“I recommend! Very professional and fast!”
Verified buyer·May 25, 2022
May 25, 2022
“Stunning!”
Verified buyer·Apr 26, 2022
Apr 26, 2022
“The stone is gorgeous.”
Verified buyer·Oct 26, 2021
Oct 26, 2021
Verified buyer·Sep 10, 2021
Sep 10, 2021
