3.13 ct unheated Round Ceylon yellow sapphire with round brilliant cut and radiant golden hue
3.13 ct round Ceylon unheated yellow sapphire rotating to show golden hue and brilliance
3.13 ct unheated Round Ceylon yellow sapphire with natural golden hue and excellent clarity
3.13 ct unheated yellow Round Ceylon yellow sapphire GIA report
3.13 ct unheated Round Ceylon yellow sapphire round brilliant cut gemstone with excellent clarity and warm golden hue
3.13 ct natural unheated yellow sapphire video showing clarity and sparkle under light
3.13 ct unheated natural Round Ceylon yellow sapphire brilliant cut gemstone with excellent clarity and warm golden hue

CG8347

3.13 ct Natural Unheated Yellow Sapphire – Round Cut | GIA Certified | Sri Lanka (Ceylon)

¥787,000 JPY
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1カラットあたり： ¥251,438

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カットスタイルファセットカット
宝石の種類サファイア
重量（ct）3.13
処理無処理
産地スリランカ
クラリティアイクリーン（当店評価）
カラーイエロー
カラーの詳細Lemon Yellow
色の濃さミディアムライト
シェイプラウンド
サイズ（mm）8.20 - 8.33 x 6.25
カットMixed Brilliant
鑑別書GIA

3.13 carat round-cut yellow sapphire, unheated, measuring 8.20–8.33 × 6.25 mm, from Sri Lanka (Ceylon). Yellow sapphire at 3+ carats in unheated quality is a meaningful find — most unheated Ceylon yellows in the commercial market are sub-1-carat. Accompanied by GIA Report #2235835331, a Sapphire Origin Report confirming weight, dimensions, color, transparency, treatment (no indications of heating), and geographic origin (Sri Lanka).

Expert Opinion

Ahmed Shareek's Assessment

"At 3.13 carats, this is a genuinely uncommon stone — the overwhelming majority of unheated Ceylon yellow sapphires I come across are under a carat, and this one carries a GIA Origin Report independently confirming both its unheated status and its Sri Lankan origin. Eye-clean clarity at this size, in natural untreated color, is not something you see often."

Rarity Analysis

  • Color: A clean, saturated lemon yellow, free of the brownish or greenish undertones that lower-grade yellow sapphire often shows.
  • Size vs. unheated supply: Most unheated yellow sapphire reaching the commercial market is under 1 carat; at 3.13 carats, this stone sits well outside that typical supply band.
  • Treatment: Confirmed unheated (no indications of heating). The large majority of yellow sapphire sold today is heat-treated to produce or improve its color, which makes an untreated stone of this size a genuine outlier.
  • Clarity: Eye-clean — no inclusions visible without magnification — adding to the stone's face-up appeal without any need for treatment to mask flaws — our own assessment, not a GIA grade.
  • Documentation: Backed by a GIA Sapphire Origin Report, a dual-confirmation document that independently verifies both treatment status and geographic origin (Sri Lanka/Ceylon) — a level of documentation most commercial yellow sapphire never receives.
  • Combined effect: Natural lemon-yellow color, unheated status, above-average size for untreated material, eye-clean clarity, and dual-confirmed GIA documentation together make this a stone that is genuinely difficult to replace in today's market.

Buying Guidance

  • Verify treatment on paper: Most yellow sapphire on the market is heated, so when comparison shopping, confirm treatment status on an independent lab report rather than a seller's description alone — this stone's GIA report states "no indications of heating."
  • Confirm the origin claim independently: Not every "Ceylon" sapphire sold online has lab-confirmed origin; this stone's Sri Lankan origin is verified by GIA, not simply asserted by the seller.
  • Weigh cut quality alongside carat weight: A yellow sapphire's face-up brightness depends heavily on cut proportions — a well-executed round brilliant, as with this stone, maximizes light return, while a poorly proportioned stone can look dull even at a larger size.
  • Compare pricing against similarly documented stones: heated yellow sapphire trades at a fraction of the price of unheated material of comparable size and color, so price comparisons are only meaningful against stones with matching treatment and certification.
  • Try Before You Buy: Whenever possible, view the stone in hand or take advantage of a return window so you can judge color and brilliance for yourself before committing.

Learn More About This Gemstone

Gemstone Data — At a Glance

Item # CG8347
Carat Weight 3.13 ct
Species / Variety Natural Yellow Sapphire (Corundum)
Shape / Cut Round Mixed Brilliant
Dimensions 8.20–8.33 × 6.25 mm
Color / Intensity Yellow (Lemon Yellow)
Phenomenon None
Treatment Unheated (no indications of heating)
Origin Sri Lanka (Ceylon) — GIA confirmed
Clarity Eye-clean — our own assessment; GIA colored-stone reports carry no clarity grade
Transparency Transparent
Hardness 9 (Mohs)
Certification GIA Report #2235835331

Features

  • SKU: CG8347
  • Carat Weight: 3.13 carats
  • Variety: Yellow Sapphire
  • Shape: Round
  • Cutting Style: Mixed Brilliant (modified brilliant crown, step cut pavilion)
  • Dimensions: 8.20–8.33 × 6.25 mm
  • Gem Type: Natural Yellow Sapphire
  • Origin: Sri Lanka (Ceylon) — GIA confirmed (GIA Sapphire Origin Report)
  • Treatment: Unheated (no indications of heating)
  • Color: Yellow (Lemon Yellow)
  • Transparency: Transparent
  • Clarity: Eye-clean — our own assessment, not a GIA grade
  • Certification: GIA Report #2235835331
  • Hardness: 9 on the Mohs scale

Care

  • Clean with lukewarm water and mild soap using a soft brush
  • Store separately to avoid surface contact
  • Remove before heavy physical activity
  • Avoid ultrasonic or steam cleaners

One of a Kind

This is a single natural gemstone, not a manufactured or lab-created replica — no two sapphires form with identical color, inclusions, and internal character. Once this stone sells, it's gone; there is no duplicate. What you see documented on the GIA report is the exact, individual stone you receive.

What's included with this Yellow Sapphire

  • GIA Report #2235835331
  • Gemstone packed in a gem sleeve

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