1930s 4.02 Carat No Heat Ceylon Sapphire in Platinum Art Deco Ring, Size 6

Details

Description

AGL and Gubelin certified no-heat 4.02 carat cushion cut Ceylon sapphire set in vintage platinum Art Deco original mounting with … Read more AGL and Gubelin certified no-heat 4.02 carat cushion cut Ceylon sapphire set in vintage platinum Art Deco original mounting with diamond halo, handmade filigree, milgrain, and ornate diamond pierced shoulders.

Accompanied with two certificates. Gubelin and AGL certified, stone measures 9.86 x 8.87 x 5.09mm. Ring size 6, adjustable.

Product Specifications:
Item Type: Art Deco Engagement Ring
Metal: Platinum 950
Size: Adjustable
Era: Art Deco
Period: Circa 1930
Certification: Gubelin 25112027, AGL 1151474

Center Stone Details:
Type: Natural Corundum Sapphire
Carat: 4.02 Carats
Cut: Cushion Shape, Modified Brilliant Cut, Modified Step Cut
Color: Blue
Transparency: Transparent
Dimensions: 9.86 x 8.87 x 5.09mm
Treatment: No Heat (NTE)
Origin: Sri Lanka (Ceylon)

Certification:
Gubelin: #25112027
AGL: #1151474

Accent Stone Details:
Type: Natural Diamond
Setting: Halo and Shoulders
Cut: Round Brilliant and Single Cut
Color: Near Colorless
Clarity: VS-SI Range

Design & Construction
Vintage Art Deco platinum mounting showcases intricate metalwork with geometric precision and ornamental filigree detailing throughout. Cushion-cut sapphire sits within milgrain-edged bezel surrounded by diamond halo creating brilliant frame. Ornate shoulders feature bezel-set diamonds arranged in circular patterns connected by pierced filigree metalwork and black enamel accents. Gallery exhibits openwork construction allowing maximum light entry while maintaining structural integrity. The mounting represents quintessential Art Deco aesthetic with symmetrical design and decorative elaboration.

About The Sapphire
This 4.02 carat Ceylon sapphire exhibits rich royal blue color with exceptional transparency and cushion cut proportions. No-heat treatment designation confirms the stone's natural color without thermal enhancement, significantly increasing value and desirability. Dual certification from Gubelin and AGL, two of the world's most respected gemological laboratories, provides comprehensive authentication and quality documentation. Ceylon sapphires from Sri Lanka remain among the most prized colored gemstones for their superior color saturation and transparency.

Large gem-quality sapphires like this are rarely found in nature—formation requires precise geological conditions, adequate pressure and temperature, and a rare combination of chemical elements including aluminum, iron, and titanium.

Most sapphires on the market are heated to improve color and clarity. This one wasn't. What you see is exactly what nature produced.
Demand for unheated sapphires continues to rise while supply from major sources—Kashmir, Burma, Sri Lanka, Madagascar, Tanzania—remains limited. Stones like this are increasingly difficult to source.

Accompanied by Gübelin Report No. 25112027. See less