Natural Blue Sapphire & Trillion Diamond Ring in 18K Two-Tone Gold | GIA Origin Report

A beautiful natural blue sapphire and diamond three-stone ring in 18K two-tone gold.

At the center is an oval natural sapphire accompanied by a GIA Sapphire Origin Report, confirming Thailand origin, blue color, transparent appearance, and heated treatment. The sapphire measures 9.23 x 7.83 x 5.13 mm and is estimated at approximately 3.0 carats by measurement.

Although GIA reports the origin as Thailand, the stone shows a bright, lively blue appearance with flashes of the open blue color many buyers love in fine Ceylon sapphires. This is a color description only — the GIA origin is Thailand.

The sapphire is set between two near-colorless trilliant-cut diamonds in an elegant 18K yellow and white gold setting. The white gold prongs brighten the sapphire and diamonds, while the yellow gold shank gives the ring a warm, classic look.

This ring has a refined three-stone design that works beautifully as a unique engagement ring, anniversary ring, or personal statement piece.

Details

• Center Stone: Natural sapphire
• GIA Report: GIA Sapphire Origin Report No. 5232637504
• Species: Natural corundum
• Variety: Sapphire
• Origin: Thailand
• Color: Blue
• Transparency: Transparent
• Treatment: Heated
• Shape: Oval
• Cutting Style: Brilliant crown / step-cut pavilion
• Measurements: 9.23 x 7.83 x 5.13 mm
• Estimated Center Stone Weight: Approx. 3.0 carats by measurement; mounted stone, not weighed loose
• Accent Stones: Two trilliant-cut near-colorless diamonds, approx. 4.1 mm each
• Metal: 18K yellow and white gold
• Ring Size: US 5, resizable
• Height from Finger: 6.7 mm
• Shank Width: 2.6 mm
• Gross Weight: Approx. 4.0 grams
• Markings: Partial “ER” maker’s mark, softened from prior resizing/polishing
• Condition: Excellent pre-owned condition with light wear consistent with age. Professionally inspected. GIA report included.

Why We Love It

The beauty of this ring is the color. Many Thai-origin sapphires are known for deeper navy tones, but this sapphire has a more open, lively blue appearance in the light. The GIA report gives buyers confidence, while the trilliant diamonds and two-tone 18K gold setting make the ring feel classic, elegant, and easy to wear.

It is a strong choice for someone who wants a natural sapphire ring with presence, documentation, and a more unique story than a standard diamond ring.