1.63 ct Natural Heat-Treated Orange Sapphire – Oval Cut | GIA Certified | Sri Lanka (Ceylon)

A natural 1.63 ct Oval Cut Orange Sapphire, heat treated to bring out its vivid yellowish-orange color — the standard, fully disclosed enhancement in the sapphire trade — measuring 7.71 × 6.46 × 4.45 mm. Orange sapphire is one of the less common color varieties of natural corundum, prized for its warm, glowing hue. GIA Sapphire Origin Report #1242032081 records the weight, dimensions, color and heat treatment, gives Sri Lanka (Ceylon) as GIA's origin opinion, and comments that the stone passed GIA's color stability test — meaning no color change was observed under the test conditions.

Rarity Analysis

Orange sapphire is one of the less common color varieties of corundum — most sapphire production is blue, and clean, vivid orange without a strong pink or brown cast is among the harder colors to find in the fancy-color range.

• Color: Pure, vivid orange — without drifting toward pink (padparadscha territory) or brown — is one of the less common hues within fancy-color sapphire. GIA describes this stone's color as Yellowish Orange, which sits in that range.
• Treatment: Heat is the standard, fully disclosed enhancement used throughout the trade to develop orange sapphire color, and GIA records it on the report as Heated. What is less common here is combining this saturation with a documented Sri Lankan origin opinion on the same report.
• Documentation: GIA Sapphire Origin Report #1242032081 records weight, dimensions, color and heat treatment, and gives Sri Lanka as GIA's origin opinion. GIA prints on the report that any statement on geographic origin is an expert opinion based on a collection of observations and analytical data — we quote it the way GIA writes it.
• Color stability: The report comments that this stone passed GIA's color stability test — no color change was observed under the test conditions. That is a test result, not a guarantee about how the stone behaves in the future.
• Cut: The report gives the cutting style as Modified Brilliant. Brilliant faceting returns light in fine, scattered flashes rather than broad flat planes, and on a warm hue like this one the cutting is what keeps the color from reading washed out face-up.
• Combined effect: Heat-treated orange sapphire on its own is available in the market. This specific hue, a Sri Lankan origin opinion, a passed color stability test and well-executed oval faceting on one stone is a narrower combination.

Buying Guidance

A few practical points to weigh before purchasing this specific stone:

• View it under more than one light source. Orange sapphire's warmth can read differently under daylight versus warm indoor lighting; this stone's oval Modified Brilliant cut is faceted to keep the color even face-up across both.
• Verify the disclosed heat treatment through the GIA report, not a seller's word alone. GIA Report #1242032081 states the heat treatment plainly — treat any comparable listing that omits or is vague about treatment as a red flag.
• Understand what the heat disclosure means. Heat is the standard, industry-accepted way this color family is brought to market, and GIA records it plainly on the report as Heated — it isn't a mark against the stone, and it does not change the hardness or the toughness of corundum.
• Read what a color stability comment actually says if you are comparing reports. On this stone GIA comments that it passed the test, which means no color change was observed under the test conditions. Read it as a result, not as a promise.
• Take the 7.71 × 6.46 × 4.45 mm measurements to your setter before you commit to a mounting. An oval at this size is not a calibrated drop-in for every ready-made setting.

Learn More About This Gemstone

• Orange Sapphire — The Complete Buyer's Guide to the Rarest Warm-Toned Corundum
• Ceylon Sapphire: The Complete Guide to the World's Most Trusted Sapphire Origin
• How Sapphire Heat Treatment Works
• What Is a GIA Sapphire Report and How Do You Read One?
• Oval Sapphire — The Complete Guide to the Most Popular Sapphire Cut
• The Ultimate Guide to Buying Natural Loose Sapphires

Why Choose this Oval Cut Orange Sapphire?

Orange is one of the less common color varieties of corundum, valued by collectors and jewelry buyers for its warm, vivid glow — a color that on this stone was brought out by heat, which the report discloses. The oval outline and Modified Brilliant faceting carry that hue well face-up, which is what separates an orange sapphire that reads vivid from one that reads washed out.

Key Benefits of this Natural 1.63 ct Oval Cut Orange Sapphire

• GIA Origin Report
  GIA Sapphire Origin Report #1242032081 records weight, dimensions, color and heat treatment, and gives Sri Lanka as GIA's origin opinion.
• An Uncommon Color
  Orange is one of the less common color varieties of corundum. On this stone the hue was developed by heat, disclosed on the report.
• Color Stability Test Passed
  GIA comments that this stone passed its color stability test — no color change was observed under the test conditions. A test result, not a guarantee about the future.
• Statement Size
  At 1.63 carats and 7.71 × 6.46 mm face-up, the color has real presence as a ring or pendant center stone.
• Hard-Wearing
  Corundum at Mohs 9 — that is scratch resistance, not resistance to a knock. GIA's report lists corundum's toughness as excellent, which is the separate property that matters for everyday wear.

Features

• Item #: CG8454
• Carat Weight: 1.63 ct
• Species / Variety: Corundum — Orange Sapphire
• Shape / Cut: Oval, Modified Brilliant
• Dimensions: 7.71 × 6.46 × 4.45 mm
• Color / Intensity: Yellowish Orange
• Phenomenon: None
• Treatment: Heat Treated (disclosed on GIA report)
• Origin: Sri Lanka (Ceylon) — GIA's origin opinion on Report #1242032081
• Color stability: passed GIA's color stability test; no color change observed under the test conditions
• Clarity: inclusions visible under 10× — our own assessment, not a GIA grade
• Transparency: Transparent
• Hardness: 9 (Mohs)
• Laboratory report: GIA Sapphire Origin Report #1242032081

Care of Your Ceylon Orange Sapphire

• 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

What's Included

• GIA Sapphire Origin Report #1242032081
• Gemstone packed in a gem sleeve

Perfect Uses for this 1.63 ct Orange Sapphire

• Statement cocktail ring center stone
• Engagement ring center stone in yellow or rose gold
• Custom pendant commission
• Collectors of GIA-documented orange sapphire
• Distinctive fine jewelry centerpiece