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Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone

Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 1
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 2
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 3
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 4
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 5
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 6
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 7
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 1
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 2
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 3
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 4
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 5
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 6
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone - Image 7

Video & Photos Show The Actual Gemstone You Will Receive.

Gemstone Video & Photography Disclaimer Each gemstone is photographed and recorded on video under professional lighting to present the most accurate representation possible. However, slight variations in color, tone, or saturation may occur due to differences in monitor calibration, mobile displays, lighting conditions, and individual screen settings.
Free Shipping : DHL Express
Delivery time : 2 - 5 business days
Est. Delivery Date : Jun 6 - Jun 8, 2026
Product Views: 2811
Natural Star sapphire 17.85 Carats Golden Black Oval Cabochon 16x13 mm Loose Gemstone
$549.00
  • Stock : In Stock
  • SKU : GEM21121676
  • Gem : C27
Product Views: 2811
Name Star sapphire
Weight 17.85 carats
Size 15.64 x 12.62 x 12.21 mm
Shape Oval Cabochon
Color Golden Black
Pieces 1
Clarity Opaque
Treatment Untreated
Origin Thailand
Lot type Single

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This Star Sapphire reflects a Golden Black color with even distribution and visual richness. Well suited for frequent use, combining durability with natural characteristics. Appreciated worldwide by collectors and jewelry designers. This Star Sapphire gemstone weighs 17.85 carats and features a Oval Cabochon cut, displaying a Golden Black tone with clarity Opaque, origin Thailand, and treatment: no treatment at all, a clean look from all angles. Completely natural, this gemstone has not undergone any treatment or enhancement. Offers natural beauty suited for a variety of purposes. Browse our collection of natural Star Sapphire gemstones.

Frequently Asked Questions

Is this star sapphire natural?

Yes, this star sapphire is a 100% natural gemstone that has been carefully sourced and verified for authenticity. At Gempiece, we never sell lab-created or man-made substitutes — all our gemstones are earth-mined natural stones.

Do you provide certification?

Yes, many of our gemstones come with certification. For others, certification can be arranged upon request at the buyer’s cost. You can select your preferred laboratory from the product information section. We offer certification from standard labs in Bangkok to premium labs such as GIA, GRS, AIGS, and Lotus, with costs typically ranging from $20 to $400 depending on the lab.

Which labs certify this star sapphire?

This star sapphire can be certified by standard laboratories in Bangkok as well as premium labs such as GIA, GRS, Lotus, and AIGS. Certification costs typically range from $20 to $500 depending on the laboratory selected. You can choose your preferred lab from the drop-down menu above the Add to Cart button.

Does it look better in daylight?

Yes, natural daylight reveals the most accurate color, brilliance, and overall appearance of the gemstone.

Can this star sapphire be used in rings?

Yes, this star sapphire can be set in rings. A suitable setting design is recommended to ensure durability and long-term wear.

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Shipping Methods

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FedEx Express

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  • Shipping cost: US $75.00 (U.S. only)
  • For other countries, please contact us for shipping rates

DHL Express

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EMS (Thai Express Mail Service)

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  • Estimated delivery time: 3 – 5 business days
  • Shipping cost: US $65.00 (U.S. only)
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  • Economical international shipping option
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  • Estimated delivery time: 2 – 5 weeks
  • Shipping cost: US $10.00 worldwide

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International shipments may be subject to customs duties, taxes, or import fees depending on the regulations of the destination country. These charges are determined by the local customs authorities and are the responsibility of the buyer.

We recommend checking with your local customs office for more information about potential charges before placing your order.

Once your order has been shipped, tracking information will be provided so you can monitor the delivery status of your shipment.

Return & Refund Policy

At Gempiece, we want you to shop with complete confidence. If you are not fully satisfied with your purchase, we offer a simple return policy for your peace of mind.


14-Day Inspection Period

You may examine your gemstone for up to 14 days from the date of receipt. If you are not satisfied for any reason, you may request a return within this inspection period.


Return Authorization

Please contact us before returning any item. Our team will provide the proper return instructions. Returns sent without prior authorization will not be eligible for a refund.

Once return authorization is provided, the item must be shipped back within the inspection period.


Return Conditions

  • Items must be returned in their original condition
  • Free from scratches, damage, blemishes, or alterations
  • Include original packaging and accompanying documentation

Refunds & Replacements

  • You may request either a full refund or a replacement
  • Refunds are processed after the returned gemstone is received and inspected
  • Shipping and handling charges are non-refundable

Return Shipping

Customers are responsible for return shipping costs. For security, we recommend using a trackable and insured courier service.


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If you need assistance with a return, please contact us at support@gempiece.com. Our team will guide you through the return process.

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