What makes Ceylon sapphire different from other sapphire?

Ceylon (Sri Lankan) sapphire is mined from alluvial gem gravels that have already been freed from host rock, and the country's mineral chemistry produces the widest color range of any single sapphire source - blue, yellow, pink, purple, green, teal, padparadscha and star sapphire. Ceylon stones are especially prized for a bright, lively light return.

Are Ceylon sapphires heated or unheated?

A meaningful share of the Ceylon sapphires in this collection are unheated - natural color as mined, with no thermal enhancement. Treatment status is stated plainly on every product page alongside any lab documentation.

Do Ceylon sapphires come with certification?

Larger and finer stones in this collection ship with GIA reports, and the issuing lab is noted on every certified listing.

What does the Mixed Brilliant cut mean for this sapphire?

A Mixed Brilliant cut combines a brilliant-cut crown (facets for maximum sparkle) with a modified brilliant pavilion, as documented on the GIA report — giving this cushion stone strong light return.

What are the care instructions for this blue sapphire?

Clean it regularly with mild soap and warm water, avoid harsh chemicals, and store it separately from other jewelry to prevent scratches.

What does the GIA report confirm about this sapphire?

GIA Report #6237949128 confirms the stone's weight, dimensions, deep blue color (described in the trade as "Royal Blue"), and heat treatment; geographic origin was not requested for this report.

Is this blue sapphire suitable for daily wear?

Yes, corundum's hardness (9 on the Mohs scale) makes this blue sapphire suitable for both everyday wear and special occasions.

1.99 ct Square cushion Blue Sapphire from Ceylon — eye-clean, heat-treated, GIA certified

1.99 ct cushion royal blue sapphire from Ceylon — blue color and light return demonstrated

1.99 carat Square cushion Blue Sapphire from Ceylon showing vivid blue hue and brilliance

GIA lab report 1.99 ct Square cushion Blue Sapphire gemstone — natural Ceylon origin, heat-treated

1.99 ct Square cushion Blue Sapphire — excellent clarity and strong blue saturation

1.99 ct cushion royal blue sapphire from Ceylon — cut detail and color saturation under light

1.99 ct cushion royal blue sapphire from Ceylon — brilliance and vivid blue hue rotating

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CG8308

1.99 ct Natural Heated Blue Sapphire – Cushion Cut | GIA Certified | Ceylon (Sri Lanka)

¥475,400 JPY

1カラットあたり： ¥238,894

ルースをお選びいただくことで、石もジュエリーのデザインも、ご自身の思いのままにお決めいただけます。

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）	1.99
処理	加熱
産地	スリランカ
クラリティ	内包物あり（当店評価）
カラー	ブルー
カラーの詳細	Royal Blue
色の濃さ	ビビッド
シェイプ	レクタングルクッション
サイズ（mm）	7.63 x 6.61 x 4.49
カット	Mixed Brilliant
鑑別書	GIA

1.99 carat rectangular cushion-cut blue sapphire, sourced from Sri Lanka (Ceylon) and heat-treated, measuring 7.63 × 6.61 × 4.49 mm. Saturated, vivid royal blue with strong brilliance — the color range that defines fine Ceylon blue sapphire. A strong center-stone candidate for an engagement ring or a vivid blue addition to a collection. Accompanied by GIA Report #6237949128, a Sapphire Report confirming weight, dimensions, color, and treatment (geographic origin was not requested for this report).

Expert Opinion

Ahmed Shareek's Assessment

"This is a genuine, well-saturated Ceylon blue sapphire at an accessible under-2-carat size — good honest color for the money. Clarity is our own assessment, not a GIA grade: inclusions are visible to the unaided eye rather than eye-clean, so I'd view the stone first and judge the face-up look for yourself before deciding."

Rarity Analysis

Genuine Ceylon (Sri Lankan) origin — the source most associated with fine blue sapphire saturation and hue, though origin here is seller-stated rather than GIA-confirmed (geographic origin was not requested for this report).
Vivid, saturated royal blue color — the tone and saturation combination Ceylon sapphire is specifically sought after for.
GIA documentation of carat weight, dimensions, color, and treatment from an independent, internationally recognized laboratory.
An accessible, under-2-carat size that puts genuine Ceylon sapphire color within reach without a rare-size premium.
Clarity is a real trade-off on this stone — inclusions are visible to the unaided eye, our own assessment rather than a GIA grade, and this is not being represented as an eye-clean or exceptionally rare gem.
Combined value: honestly disclosed heat treatment, genuinely saturated Ceylon color, and independent GIA documentation together make this a straightforward, fairly priced entry point into natural Ceylon sapphire — not a rarity or investment claim.

Buying Guidance

Clarity is the main consideration here: this stone has, in our own assessment, inclusions visible to the unaided eye rather than being eye-clean, and how noticeable they are can vary with lighting and viewing angle.
Heat treatment is standard, industry-accepted, and clearly disclosed — the majority of blue sapphire on the market is heated, and this GIA report confirms the treatment.
Origin (Sri Lanka/Ceylon) is seller-stated based on sourcing; GIA geographic origin determination was not requested for this report, so treat origin as a seller representation rather than an independently verified lab finding.
The rectangular cushion shape's corners benefit from a protective setting (bezel or well-secured prongs), especially for everyday wear.
Try Before You Buy: because clarity is the main variable on this stone, we recommend viewing it in person — or requesting additional photos/video under different lighting — before purchase, so you can judge exactly how the inclusions affect face-up beauty for yourself.

Learn More About This Gemstone

What Is a GIA Sapphire Report and How Do You Read One? — how to read the GIA report accompanying this stone.
Blue Sapphire — The Complete Buyer's Guide to Color, Origin, and Value — background on blue sapphire color, origin, and value.
The Ultimate Guide to Buying Natural Loose Sapphires — a general framework for evaluating a natural sapphire before you buy.
Cushion Cut Sapphire — The Complete Guide to the Vintage Shape That Deepens Color — more on this stone's rectangular cushion cutting style.
How Sapphire Heat Treatment Works — Temperature, Process, and What Changes Inside the Stone — what heat treatment is and why it's standard practice.
Heated vs Unheated Sapphire — What's the Difference? — how heated sapphires like this one compare to unheated stones.
Ceylon Sapphire — Why Sri Lanka Origin Matters — background on Ceylon origin character; note that origin on this particular stone is seller-stated, not a GIA origin determination.
Custom Sapphire Rings — The Complete Guide to Designing Your Own — how to design a custom ring around this stone.

Gemstone Data — At a Glance

Item #	CG8308
Carat Weight	1.99 ct
Species / Variety	Natural Blue Sapphire (Corundum)
Shape / Cut	Rectangular Cushion, Mixed Brilliant
Dimensions	7.63 × 6.61 × 4.49 mm
Color / Intensity	Deep Blue (Royal Blue)
Phenomenon	None
Treatment	Heated
Origin	Sri Lanka (Ceylon) — seller-stated; GIA origin not requested
Clarity	Inclusions visible to the unaided eye — our own assessment; GIA colored-stone reports carry no clarity grade
Transparency	Transparent
Hardness	9 (Mohs)
Certification	GIA Report #6237949128

Features

SKU: CG8308
Carat Weight: 1.99 carats
Variety: Blue Sapphire
Shape: Rectangular Cushion
Cutting Style: Mixed Brilliant (brilliant crown, modified brilliant pavilion)
Dimensions: 7.63 × 6.61 × 4.49 mm
Gem Type: Natural Blue Sapphire
Origin: Sri Lanka (Ceylon)
Treatment: Heated
Color: Deep Blue (Royal Blue)
Transparency: Transparent
Clarity: Inclusions visible to the unaided eye — our own assessment, not a GIA grade
Certification: GIA Report #6237949128
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 Blue Sapphire

GIA Report #6237949128
Gemstone packed in a gem sleeve

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