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Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone

Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 1
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 2
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 3
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 4
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 5
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 6
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 7
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Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 1
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 2
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 3
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 4
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 5
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone - Image 6
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 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 : Thai Airmail
Delivery time : 3 - 4 weeks Est. Delivery date : May 1 - May 11, 2026
Product Views: 2029
Natural Sillimanite 6.57 Carats Pastel Yellow Oval 12x10 mm Loose Gemstone
$186.00
  • Stock: In Stock
  • SKU: GEM23123297
  • Gem: C59
Product Views: 2029
Name Sillimanite
Weight 6.57 carats
Size 13.11x10.23x7.12 mm
Shape Oval
Color Pastel Yellow
Pieces 1
Clarity VVS
Treatment No treatment at all
Origin Srilanka
Lot type Single

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This Sillimanite offers a Pastel Yellow tone with natural brilliance, suited for regular wear. Offering both affordability and natural beauty, it remains a popular choice. Valued across multiple regions for its balanced color and clarity. This Sillimanite weighing 6.57 carats in Oval displays a Pastel Yellow tone with origin Srilanka and lot type single, a pristine and clean overall look. A naturally formed gemstone that has not been altered or enhanced. A refined gemstone valued for its color and natural characteristics. Browse our collection of natural Sillimanite gemstones.

Frequently Asked Questions

Is this Sillimanite natural?

Yes, this Sillimanite 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.

Do you take custom orders such as matched pairs or calibrated sizes?

Yes, we do take custom orders, including matched pairs, calibrated sizes, and specific requirements based on your needs. Since we work directly with rough material and handle cutting in-house, we can accommodate custom requests depending on availability and feasibility. You can contact us with your requirement, and we will guide you through the options and timelines.

Can I get consultation?

Yes, expert consultation is available. You can contact us via WhatsApp below the “Add to Cart” button or use the “Questions” option next to it if WhatsApp is not available.

How accurate are your images and videos?

Our images and videos are captured using high-definition professional macro equipment by experienced videographers. We aim to show every detail — including pinpoints, individual facets, inclusions, color, and brilliance — from all angles. While we strive for maximum accuracy, very slight variations may occur due to screen settings or lighting conditions.

Gemstone
Refractive Index 1.653 to 1.685
Mohs Hardness 6 to 7.5
Specific Gravity 3.20 to 3.26
Material Fibrolite
Birthstone Month Unknown

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Shipping Policy

Orders are normally processed and shipped within 24 hours after payment confirmation, excluding weekends and public holidays.


Shipping Methods

We offer the following reliable and trackable shipping options:


FedEx Express

  • Fast and secure international courier service
  • Online tracking available
  • Estimated delivery time: 3 – 5 business days
  • Shipping cost: US $75.00 (U.S. only)
  • For other countries, please contact us for shipping rates

DHL Express

  • Fast and secure international delivery
  • Online tracking available
  • Estimated delivery time: 3 – 5 business days
  • Shipping cost: US $70.00 (U.S. only)
  • For other countries, please contact us for shipping rates

EMS (Thai Express Mail Service)

  • Reliable international postal express service
  • Online tracking available
  • Estimated delivery time: 3 – 5 business days
  • Shipping cost: US $65.00 (U.S. only)
  • For other countries, please contact us for shipping rates

Thai Air Mail

  • Economical international shipping option
  • Online tracking available
  • Estimated delivery time: 2 – 5 weeks
  • Shipping cost: US $10.00 worldwide

Customs & Import Duties

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.


Our Guarantee

  • 100% Money-Back Guarantee
  • 14-Day Inspection Period
  • No Restocking Fees

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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