Seafoam Green Aquamarine 57.90ct
Seafoam Green Aquamarine 57.90ct
Seafoam Green Aquamarine 57.90ct
US$ 5,857
57.9ct Aquamarine at US$ 101/ct · certified by GIA
Certification?GIA Certificate Included
| Weight | 57.9 ct |
| Shape / Cut | Cushion / Modified Brilliant Cut |
| Color | Seafoam Green |
| Clarity | SI-1 |
| Treatment | None |
| Origin | Madagascar |
| Dimensions | 28.38 x 22.78 x 13.17 mm |
| Certificate | GIA / 7356629391 |
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
Seafoam Green
Indicative tonal range for this colour family. For reference only — screens vary.
This 57.9ct aquamarine sits in the seafoam green range of the aquamarine colour scale.
Clarity
SI-1
This 57.9ct aquamarine is graded SI-1. Slightly Included: inclusions are visible under magnification and may be faintly visible to the naked eye.
Shape & size
Cushion
28.38 × 22.78 × 13.17 mm
This 57.9ct aquamarine measures 28.38 × 22.78 × 13.17 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$ 5,857
US$ 101 / carat
Retail price
US$ 12,885
STARLANKA buys rough at source and cuts it in-house in Bangkok, so a stone reaches you without the layers of margin a aquamarine 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
GIA certified
This 57.9ct aquamarine is accompanied by an independent laboratory report from GIA, report number 7356629391.
- 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 aquamarine natural or lab-created?
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This STARLANKA aquamarine (SKU AQ0913) is a natural, earth-mined aquamarine. STARLANKA sells only natural gemstones and does not offer synthetic or laboratory-created stones.
Has this aquamarine been treated?
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This STARLANKA aquamarine (SKU AQ0913) is untreated. It is sold as a natural, untreated aquamarine, with no heat or enhancement of any kind.
Does this stone come with a certificate?
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This STARLANKA aquamarine (SKU AQ0913) is accompanied by an independent laboratory report from GIA, report number 7356629391.
What size is a 57.9ct cushion aquamarine?
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This STARLANKA aquamarine (SKU AQ0913) weighs 57.9 carats and measures 28.38 × 22.78 × 13.17 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 aquamarine (SKU AQ0913) 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 aquamarine?
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This STARLANKA aquamarine (SKU AQ0913) 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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Aquamarine Reviews(84)
“Accurate descriptions, good prices and extremely fast shipping! Excellent service.”
Verified buyer·Jul 4, 2026
Jul 4, 2026
“More beautiful than pictures”
Verified buyer·Mar 15, 2025
Mar 15, 2025
“So good but lottle bit small😊”
Verified buyer·Oct 28, 2024
Oct 28, 2024
“Better than I expected”
Verified buyer·May 9, 2024
May 9, 2024
“There is no clarity.🤷♀️”
Verified buyer·Apr 29, 2024
Apr 29, 2024
“Beautiful as pictured”
Verified buyer·Mar 16, 2024
Mar 16, 2024
“Suhail will always do his best to exceed your expectations. Communication is always prompt and helpful, keeping in mind the time difference of course.”
Verified buyer·Feb 15, 2024
Feb 15, 2024
