Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
A natural 1.83 carat ruby in a cushion cut, completely untreated, accompanied by a GIA report. Untreated ruby — corundum that has never been heated — is among the most rare and collectible gemstones available in the loose stone market. Heat treatment is standard practice for virtually all commercial ruby (some estimates place this above 95% of the market), so a GIA-documented untreated ruby above 1 carat represents a genuinely exceptional find. The cushion cut at 1.83 carats produces strong face-up color in the deep red range that ruby is prized for.
Why Choose this 1.83 ct Untreated GIA Cushion Ruby?
The combination of three factors — untreated status, GIA documentation, and above-1.5-carat size — places this stone in the upper tier of natural ruby collecting. Untreated status means the color is entirely natural: no furnace, no glass filling, no enhancement of any kind. The GIA report confirms this independently. At 1.83 carats, the stone has the weight for a dominant center stone in ring or pendant settings, and the cushion cut deepens the red across the face-up surface.
Key Benefits of this Natural Ruby
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Untreated — GIA Confirmed
No heat treatment, no glass filling, no enhancement. Certified untreated by GIA — the most authoritative confirmation available.
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Exceptional Rarity
GIA-documented untreated ruby above 1.5 carats is among the most sought-after colored gemstones in trade.
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1.83-Carat Center Stone Size
Large enough for a dominant presence in any engagement ring, cocktail ring, or pendant.
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Cushion Cut Color Depth
The cushion geometry concentrates the deep red saturation across the face-up surface.
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Durable for Daily Wear
Corundum at Mohs 9, second only to diamond.
Features
- Carat Weight: 1.83 Carats
- Gem Type: Natural Ruby
- Cut: Cushion
- Treatment: Untreated — GIA confirmed
- Color: Red
- Clarity: Eye-clean — no visible inclusions under normal viewing
- Certification: GIA report
- Hardness: 9 on the Mohs scale
This 1.83 ct untreated GIA cushion ruby has been hand-selected as an exceptional specimen — GIA-confirmed untreated ruby of this size is the combination that defines the finest tier of natural ruby collecting.
Why Customers Love This Gemstone
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GIA Untreated Confirmation: The most authoritative verification in the gemstone world — no treatment, no exception.
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True Rarity: Untreated ruby above 1.5 carats is one of the rarest gem categories available commercially.
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Investment Grade: Untreated, GIA-documented, above 1.5 carats — the specification that defines collector-level ruby.
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Trusted Source: Every claim independently confirmed, nothing undisclosed.
Owning this 1.83 ct untreated GIA cushion ruby means acquiring one of the genuinely rare gemstones in the colored stone market — a stone whose natural color is confirmed by the world's most recognized laboratory.
Perfect Uses for this 1.83 ct Untreated Ruby
- Investment-grade gemstone collection
- Statement engagement ring center stone
- Collectors of GIA-documented untreated ruby
- Heirloom-quality custom commission
- Significant anniversary or milestone gift
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