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

A natural 1.63 ct Oval Cut Orange Sapphire from Sri Lanka (Ceylon), heat treated to bring out its vivid yellowish-orange color — a widely accepted and stable 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. Accompanied by GIA Report #1242032081, confirming weight, dimensions, color, and treatment; this stone also passed GIA’s color stability test, confirming the orange hue will not fade or change with prolonged light exposure.

Rarity Analysis

Orange sapphire is a genuinely uncommon color variety of corundum — the vast majority of sapphire production is blue, and clean, vivid orange without a strong pink or brown cast makes up a small slice of overall fancy-color sapphire supply.

• Color: Pure, vivid orange — without drifting toward pink (padparadscha territory) or brown — is one of the less common hues within fancy-color sapphire; this stone's yellowish-orange sits in that genuinely uncommon range.
• Treatment: Heat treatment is the standard, fully disclosed enhancement used throughout the trade to develop and stabilize orange sapphire color; what's uncommon here isn't the treatment itself but combining this saturation and clarity with independent lab verification.
• Documentation: GIA Report #1242032081 confirms weight, dimensions, color, and treatment — a level of independent verification a meaningful share of the orange sapphire market doesn't carry.
• Color stability testing: This stone passed GIA's color stability test, confirming its hue holds under prolonged light exposure — an additional check that most sellers don't offer or disclose.
• Cut: The oval Modified Brilliant faceting is chosen specifically to maximize face-up color and sparkle, which matters more for orange sapphire than for darker colors since a poorly cut stone can read washed out.
• Combined effect: Individually, heat-treated orange sapphire is available in the market. A stone combining this specific hue, GIA documentation, a passed color stability test, and well-executed oval faceting narrows the field considerably.

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 that heat treatment here is stable and permanent. It doesn't affect durability, and it's the standard, industry-accepted way this color family is brought to market — it isn't a mark against the stone.
• Ask about the color stability test result if comparing against other orange sapphires. Not every report includes this check; this stone's does, and it passed.
• Plan the setting around the oval outline and 7.71 × 6.46 × 4.45 mm footprint so prongs sit correctly at the stone's points.

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?

Natural orange sapphire is one of the rarer color varieties of corundum, valued by collectors and jewelry buyers for its warm, vivid glow. The oval cut's brilliant faceting maximizes the stone's face-up color and sparkle, making the orange hue clearly readable in any ring or pendant setting.

Key Benefits of this Natural 1.63 ct Oval Cut Orange Sapphire

• GIA Documentation
  GIA Report #1242032081 confirms weight, dimensions, and treatment status.
• Rare Orange Color
  Orange sapphire is one of the less common color varieties of natural corundum.
• Color Stability Tested
  Passed GIA's color stability test, confirming the orange hue will not fade or change with prolonged light exposure.
• Statement Size
  At 1.63 carats the vivid orange has strong visual presence in any jewelry setting.
• Durable for Daily Wear
  Corundum at Mohs 9, second only to diamond.

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)
• Clarity: Slightly Included
• Transparency: Transparent
• Hardness: 9 (Mohs)
• Certification: GIA 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 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