{"product_id":"1-83-ct-cushion-shaped-natural-ruby-untreated-gia","title":"1.83 ct Natural Unheated Ruby – Cushion Cut | GIA Certified","description":"\u003cp\u003eA natural 1.83 ct cushion-cut ruby, completely untreated, certified by GIA as a Ruby Origin Report (#6233835340) confirming Madagascar origin and no indications of heating. 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 purplish red range that fine ruby is prized for.\u003c\/p\u003e\n\n\u003cdiv style=\"border: 2px solid #5b2c6f; border-radius: 10px; padding: 20px 24px; margin: 28px 0; background-color: #f9f5fc;\"\u003e\n\u003ch2 style=\"margin-top: 0; margin-bottom: 12px; color: #4a235a;\"\u003eExpert Opinion\u003c\/h2\u003e\n\u003cp style=\"font-weight: 600; margin-bottom: 6px;\"\u003e\u003ca href=\"https:\/\/crescentgems.com\/pages\/ahmed-shareek-about-the-owner\" style=\"color: #4a235a; text-decoration: underline;\"\u003eAhmed Shareek\u003c\/a\u003e's Assessment\u003c\/p\u003e\n\u003cp style=\"font-style: italic; margin-bottom: 0;\"\u003e\"With heat treatment standard on over 95% of commercial ruby, a genuinely untreated stone above 1.5 carats is one of the rarest things I get to offer — and having GIA confirm both the untreated status and the Madagascar origin on one report is a level of documentation most untreated rubies in the trade simply don't carry.\"\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eRarity Analysis\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUntreated status:\u003c\/strong\u003e Well over 95% of commercial ruby on the market today is heat-treated to improve color and clarity. A stone with no indications of heating at all — confirmed by GIA rather than claimed by a seller — sits in a small minority of world ruby production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA Ruby Origin Report:\u003c\/strong\u003e Report #6233835340 is a Ruby Origin Report, meaning GIA independently confirmed species, weight, dimensions, treatment status, AND Madagascar origin in a single document. That dual confirmation — treatment and origin together — is a meaningfully higher bar than an undocumented \"natural, Madagascar\" claim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbove-1.5-carat size:\u003c\/strong\u003e Untreated ruby becomes progressively harder to find as size increases, since larger untreated rough is rarer and more likely to be heat-treated to maximize yield and color. At 1.83 carats, this stone clears a size threshold where untreated material is genuinely scarce.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurplish red color:\u003c\/strong\u003e This hue falls within the color range most associated with fine ruby, and the mixed cut (modified brilliant crown \/ step pavilion) is built to concentrate that saturation across the face-up view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest clarity note:\u003c\/strong\u003e This stone is graded Slightly Included, not flawless — a completely normal and expected clarity level for natural, untreated ruby of this size. Untreated rubies typically retain more of their natural inclusions than treated stones, since heating is often used partly to reduce the visibility of inclusions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined effect:\u003c\/strong\u003e Untreated status, GIA-confirmed Madagascar origin, and above-1.5-carat weight rarely appear together on a single stone. Individually each factor narrows the field; together, they place this ruby in a genuinely rare category within the natural colored stone market.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eBuying Guidance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify untreated status on paper, not on faith:\u003c\/strong\u003e Because heat treatment is standard practice for the overwhelming majority of commercial ruby, \"untreated\" is a claim that needs independent laboratory confirmation. Take any untreated claim seriously only when it is backed by a report from a major lab like GIA — as it is here.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin documentation is a higher bar than an origin claim:\u003c\/strong\u003e A GIA Origin Report confirming Madagascar carries far more weight than a seller simply stating \"Madagascar origin\" with no laboratory backing. Ask to see the report, and confirm the report number matches the stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderstand what clarity level to expect:\u003c\/strong\u003e Untreated ruby, especially in larger sizes, will typically show more visible inclusions than heat-treated material of similar size. A \"Slightly Included\" grade on an untreated stone is normal and should not be read as a flaw relative to the category.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCare benefits of untreated ruby:\u003c\/strong\u003e Because this stone has never been heated or filled, it can be safely cleaned with an ultrasonic or steam cleaner — an option not recommended for many treated or glass-filled rubies, where heat or vibration can damage the filler material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTry Before You Buy:\u003c\/strong\u003e Request additional photos or a video call to view the stone's color and clarity in person before purchasing, and confirm return policy terms so you can evaluate the stone hands-on with confidence.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eLearn More About This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/ruby-buyers-guide\"\u003eRuby — The Complete Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/what-is-a-gia-sapphire-report-and-how-do-you-read-one\"\u003eHow to Read a GIA Lab Report\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/how-to-commission-custom-sapphire-ring\"\u003eCustom Ring Settings for Loose Gemstones\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/crescentgems.com\/blogs\/information-pages-complete-guide\/the-smart-way-to-buy-loose-gemstones-online-in-2026\"\u003eThe Smart Way to Buy Loose Gemstones Online\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"border: 2px solid #5b2c6f; border-radius: 10px; padding: 20px 24px; margin: 28px 0; background-color: #f9f5fc;\"\u003e\n\u003ch2 style=\"margin-top: 0; margin-bottom: 14px; color: #4a235a;\"\u003eGemstone Data — At a Glance\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600; width: 42%;\"\u003eItem #\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eCG8338\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eCarat Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e1.83 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eSpecies \/ Variety\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eNatural Ruby (Corundum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eShape \/ Cut\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eCushion, Mixed Cut (Modified Brilliant Crown \/ Step Pavilion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e6.62 × 6.19 × 5.03 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eColor \/ Intensity\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003ePurplish Red\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003ePhenomenon\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eTreatment\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eUntreated — GIA confirmed (no indications of heating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eMadagascar (GIA determined)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eClarity\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eSlightly Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eTransparency\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003eTransparent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee; font-weight: 600;\"\u003eHardness\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px; border-bottom: 1px solid #e5d9ee;\"\u003e9 (Mohs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 6px 8px; font-weight: 600;\"\u003eCertification\u003c\/td\u003e\n\u003ctd style=\"padding: 6px 8px;\"\u003eGIA Report #6233835340\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Choose this 1.83 ct Cushion Untreated Ruby?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThe combination of three factors — untreated status, GIA documentation (Report #6233835340), 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, along with a Madagascar origin determination. 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 purplish red across the face-up surface.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eKey Benefits of this Natural Ruby\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUntreated — GIA Confirmed\u003c\/strong\u003e\u003cbr\u003eNo heat treatment, no glass filling, no enhancement. Certified untreated by GIA (Report #6233835340) — the most authoritative confirmation available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Rarity\u003c\/strong\u003e\u003cbr\u003eGIA-documented untreated ruby above 1.5 carats is among the most sought-after colored gemstones in trade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.83-Carat Center Stone Size\u003c\/strong\u003e\u003cbr\u003eLarge enough for a dominant presence in any engagement ring, cocktail ring, or pendant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed Cut Craftsmanship\u003c\/strong\u003e\u003cbr\u003eA modified brilliant crown paired with a step-cut pavilion concentrates the deep purplish red saturation across the face-up surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable for Daily Wear\u003c\/strong\u003e\u003cbr\u003eCorundum at Mohs 9, second only to diamond.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVariety: Ruby\u003c\/li\u003e\n\u003cli\u003eCarat Weight: 1.83 Carats\u003c\/li\u003e\n\u003cli\u003eDimensions: 6.62 x 6.19 x 5.03 mm\u003c\/li\u003e\n\u003cli\u003eShape: Cushion\u003c\/li\u003e\n\u003cli\u003eCut Style: Mixed Cut (Modified Brilliant Crown \/ Step Pavilion)\u003c\/li\u003e\n\u003cli\u003eTreatment: Untreated — GIA confirmed (no indications of heating)\u003c\/li\u003e\n\u003cli\u003eColor: Purplish Red\u003c\/li\u003e\n\u003cli\u003eOrigin: Madagascar (GIA determined)\u003c\/li\u003e\n\u003cli\u003eClarity: Slightly Included\u003c\/li\u003e\n\u003cli\u003eCertification: GIA Report #6233835340\u003c\/li\u003e\n\u003cli\u003eHardness: 9 on the Mohs scale\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis 1.83 ct cushion untreated ruby has been hand-selected as an exceptional specimen — GIA-confirmed untreated ruby of this size and origin is the combination that defines the finest tier of natural ruby collecting.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eOne of a Kind\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThis is a single natural gemstone, not a manufactured or mass-produced item — no two rubies are exactly alike, and once this stone sells, this particular listing will not be restocked.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eCare of Cushion Ruby\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp\u003eRuby is durable (Mohs 9) but should still be cared for thoughtfully. Clean with warm water, mild soap, and a soft brush; since this stone is untreated and unfilled, it can safely be cleaned with an ultrasonic or steam cleaner if needed, unlike many treated rubies. Store separately from other jewelry to prevent surface scratches, and remove the stone before activities involving harsh chemicals or impact.\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003eWhy Customers Love This Gemstone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGIA Untreated Confirmation:\u003c\/strong\u003e The most authoritative verification in the gemstone world — no treatment, no exception.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrue Rarity:\u003c\/strong\u003e Untreated ruby above 1.5 carats is one of the rarest gem categories available commercially.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInvestment Grade:\u003c\/strong\u003e Untreated, GIA-documented, above 1.5 carats — the specification that defines collector-level ruby.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Source:\u003c\/strong\u003e Every claim independently confirmed, nothing undisclosed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOwning 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 and Madagascar origin are confirmed by the world's most recognized laboratory (Report #6233835340).\u003c\/p\u003e\n\n\u003ch2\u003e\u003cspan role=\"text\"\u003e\u003cstrong\u003ePerfect Uses for this 1.83 ct Untreated Ruby\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eInvestment-grade gemstone collection\u003c\/li\u003e\n\u003cli\u003eStatement engagement ring center stone\u003c\/li\u003e\n\u003cli\u003eCollectors of GIA-documented untreated ruby\u003c\/li\u003e\n\u003cli\u003eHeirloom-quality custom commission\u003c\/li\u003e\n\u003cli\u003eSignificant anniversary or milestone gift\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Crescent Gems","offers":[{"title":"Default Title","offer_id":42701345947715,"sku":"CG8338","price":13793.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8982\/8931\/files\/1112023001_605e32fa-94a6-4628-bef2-71ed6b4b179e.jpg?v=1778308024","url":"https:\/\/crescentgems.com\/en-gcc\/products\/1-83-ct-cushion-shaped-natural-ruby-untreated-gia","provider":"Crescent Gems","version":"1.0","type":"link"}