You have not bid on this auction.
0.90 cts Natural Red Ruby Cushion Cut Certified Elegance
- SKU
- Dimensions (mm)
- 5.2 x 5.17 x 3.32mm
- Weight (cts)
- 0.9
- Certified Gemstones
- Yes
- Treatment
- Heat Treatment
- Clarity
- N/A
- Type
- Faceted
- Shape
- Cushion
- Certificate Gem Lab
- AIG
- Colours
-
Presenting a captivating 0.90 carat Natural Ruby, professionally certified by AIG American International GemLab. With its rare pinkish-red hue and precise cushion cut, this gemstone radiates a refined brilliance that makes it ideal for collectors, designers, and connoisseurs of fine gems.
Gemstone Highlights
Gem Type: Natural Ruby
Color (Hue): Pinkish Red
Hardness: 9.0 on Mohs scale – exceptional durability
Cut: Cushion Cut
Measurements: 5.20 × 5.17 × 3.32 mm
Weight: 0.90 cts
Treatment: HT (B), as noted by AIG
Certification: AIG – Report No. GEM20251104151613 (dated 04 Nov 2025)
Description
This ruby has been traditionally heat-treated to enhance its color and clarity. The “HT (B)” grade means it shows minor flux residues in tiny fissures caused when a flux such as borax is used during heating to help heal natural inclusions. This is a stable and common enhancement for natural rubies.
This Ruby’s vibrant pinkish-red glow embodies both sophistication and the timeless allure associated with one of the world’s most revered gemstones. Its clean geometry and balanced proportions in a precise square cut give it a modern, high-end aesthetic ideal for luxury jewelry pieces whether set in a minimalist ring, pendant, or bespoke design.
With a Mohs hardness of 9, this gem promises exceptional longevity, making it both a beautiful and practical investment. The AIG certification provides assurance of authenticity, quality, and full transparency in treatment disclosure.
This exquisite stone is perfect for buyers seeking a certified, eye-catching ruby with strong color and elegant symmetry—offered at a size that provides brilliance without compromising versatility in design.
| Shipping provider | Shipping to United States of America | Shipping to rest of world | Combined Shipping (United States of America) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
Not available |
|
| DHL |
|
|
Not available |
|
- SKU
- Dimensions (mm)
- 5.2 x 5.17 x 3.32 mm
- Weight (cts)
- 0.9
- Certified Gemstones
- Yes
- Treatment
- Heat Treatment
- Clarity
- N/A
- Type
- Faceted
- Shape
- Cushion
- Certificate Gem Lab
- AIG
- Colours
-
Presenting a captivating 0.90 carat Natural Ruby, professionally certified by AIG American International GemLab. With its rare pinkish-red hue and precise cushion cut, this gemstone radiates a refined brilliance that makes it ideal for collectors, designers, and connoisseurs of fine gems.
Gemstone Highlights
Gem Type: Natural Ruby
Color (Hue): Pinkish Red
Hardness: 9.0 on Mohs scale – exceptional durability
Cut: Cushion Cut
Measurements: 5.20 × 5.17 × 3.32 mm
Weight: 0.90 cts
Treatment: HT (B), as noted by AIG
Certification: AIG – Report No. GEM20251104151613 (dated 04 Nov 2025)
Description
This ruby has been traditionally heat-treated to enhance its color and clarity. The “HT (B)” grade means it shows minor flux residues in tiny fissures caused when a flux such as borax is used during heating to help heal natural inclusions. This is a stable and common enhancement for natural rubies.
This Ruby’s vibrant pinkish-red glow embodies both sophistication and the timeless allure associated with one of the world’s most revered gemstones. Its clean geometry and balanced proportions in a precise square cut give it a modern, high-end aesthetic ideal for luxury jewelry pieces whether set in a minimalist ring, pendant, or bespoke design.
With a Mohs hardness of 9, this gem promises exceptional longevity, making it both a beautiful and practical investment. The AIG certification provides assurance of authenticity, quality, and full transparency in treatment disclosure.
This exquisite stone is perfect for buyers seeking a certified, eye-catching ruby with strong color and elegant symmetry—offered at a size that provides brilliance without compromising versatility in design.
| Shipping provider | Shipping to United States of America | Shipping to rest of world | Combined Shipping (United States of America) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
Not available |
|
| DHL |
|
|
Not available |
|
Hey fellas I am Alijahn Quin, My father has been part of the vintage watch and diamond industry for....
-
PositiveItem received as described. Another stone from the same seller had broken while being preparing to ship, I was quickly notified and refunded. Overall a great experience and reasonable priced stone.
-
PositiveItem received as described. Another stone from the same seller had broken while being preparing to ship, I was quickly notified and refunded. Overall a great experience and reasonable priced stone.
Why are users outbidding themselves?
When a bid is placed, this is the maximum amount a person is willing to bid for the product. Our system will then automatically bid on behalf of the bidder, incrementally increasing the bid up to the maximum to maintain their position as the highest bidder.
When there is an icon indicating 'Automatic Bid', it means our system is actively placing bids for the bidder based on their maximum bid. This may appear as if bidders are outbidding themselves, but it's simply a result of the system updating the bid to reflect the bidders maximum limit.
Audit
-
Description Accurate
-
Pictures Accurate
Comments
After thorough evaluation of the Verified seller's information provided, Gem Rock Auctions has found accurate and honest pictures and details for this listing. Gem Rock Auctions is committed to holding our sellers to the highest standards of integrity and transparency. As part of this policy, we only permit the sale of natural, earth mined, gemstones. Manmade, synthetic, and imitation gemstones are not permitted on Gem Rock auctions. Many Gemstones have received treatments to enhance their color and/or clarity to further emphasize their beauty and we insist treatments are disclosed. Unless accompanied by a report from an approved laboratory, all origins or treatments declared in the listing are the sellers' opinion. There are limitations to what can be determined without physically handling the listed item.