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GIA Certified 4.15 Carat Oval Thai Sapphire & Diamond in Platinum Vintage Ring
ASSAY
$17,000.00
GIA Certified 4.15 Carat Oval Thai Sapphire & Diamond in Platinum Vintage Ring
Est. Delivery Between: and
A GIA certified 4.15 carat oval Thai blue sapphire and 1.32 carat total weight diamond double halo platinum vintage cocktail ring from the 1970s, featuring 30 round brilliant and 24 baguette diamonds in an alternating double halo surrounding a deep royal blue four-prong center sapphire on a split platinum shank. Size 7, adjustable; total weight 12.02 grams.
Product Specifications:
- Item Type: Vintage Cocktail Statement Ring
- Metal: Platinum
- Size: 7 (adjustable)
- Total Weight: 12.02 grams
- Shank Style: Split double-row platinum shank
- Certification: GIA Certified
- Era: 1970s (Vintage)
Center Stone Details:
- Type: Natural Blue Sapphire
- Origin: Thailand (Thai)
- Carat: 4.15 carats
- Cut: Oval
- Color: Deep royal blue
- Setting: Four-prong
- Certification: GIA
- Certificate Number: 1553070662
Accent Diamond Details — Round Brilliant:
- Type: Natural Diamond
- Quantity: 30 stones
- Cut: Round Brilliant
- Setting: Inner halo and outer scalloped positions
Accent Diamond Details — Baguette:
- Type: Natural Diamond
- Quantity: 24 stones
- Cut: Baguette
- Setting: Channel set outer halo ring
Combined Diamond Total:
- Total Carat Weight: 1.32 carats
- Total Stones: 54 pieces (30 round + 24 baguette)
About the Setting:
The platinum mounting features a sophisticated double halo architecture typical of the finest 1970s cocktail ring design — an inner ring of prong-set round brilliant diamonds immediately surrounds the four-prong sapphire center, while an outer scalloped border alternates baguette channels with larger round brilliant accent positions at the cardinal points, creating a floral-shaped outline that expands the visual footprint of the ring dramatically beyond the center stone alone. The split double-row shank adds structural refinement visible from the side profile, tapering elegantly from the broad face into a comfortable wearing width. Every element is executed in platinum — the hardest and most precious of the jewelry metals — ensuring durability and color neutrality that maximizes the deep blue of the sapphire against the white diamond surround.
About the Stones:
The 4.15 carat GIA certified oval Thai sapphire displays a deep, saturated royal blue with the characteristic inky depth associated with Thai-origin stones — a distinct and collectible origin that differs from the lighter, more electric blue of Ceylon sapphires and the velvety cornflower of Burmese stones. Thai sapphires of this carat weight with GIA certification are actively collected for their bold color, gemological documentation, and the assurance of natural origin that the certificate provides. The 1.32 carats of surrounding diamonds — 30 round brilliants and 24 baguettes — create an alternating sparkle pattern that frames the sapphire in continuous white light, enhancing the depth of the blue center through contrast and amplifying the overall brilliance of the ring from across a room.
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