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Helena Radiant-Cut Three Stone Diamond Ring (3/8 ct. tw.) in Platinum

$2,990 (Setting Only)


Diamond Origin: Natural

Order now and your order ships by Wed, Nov 25, depending on center diamond.

gift with purchase tier gift item

ENDS SOON!

1/4 Carat Lab Diamond Studs
With Purchase Over $1,000. A $200 Value.
Use Code STUDS in Cart.

Free Shipping & Holiday Returns
Free Lifetime Warranty
Free 1-Year Resizing

Product Details

This three stone engagement ring pairs radiant-cut diamonds with the center gem for an angular, faceted look.
  • Easy monthly payments with Affirm. From 0% APR financing. Up to 36 months. Subject to credit approval.
  • Special 12 month financing options available with Wells Fargo, subject to credit approval.
  • Layaway options also available.
  • Learn More

Why you'll love it

Low Profile

A setting that makes for a comfortable, snag-free wear.

Exceptional Durability

The band’s thick depth provides strength.

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Why you'll love it

White gold engagement ring inside wooden jewelry box.

Order Details

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The Brilliant Earth Difference

Our team designs our collections with precision and skill at our San Francisco studio. We know it’s the details that matter most — so we obsess over each one.
Our dedication to quality craftsmanship begins with our responsibly sourced precious metals.
From our Beyond Conflict Free Diamonds® to the most innovative lab diamonds on the planet, our world class gemologists have been sourcing exceptional diamonds with traceable origins for twenty years.
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award-winning
artistry

award-winning
artistry

Our team designs our collections with precision and skill at our San Francisco studio. We know it’s the details that matter most — so we obsess over each one.

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Unmatched
materials & craftsmanship

Unmatched
materials & craftsmanship

Our dedication to quality craftsmanship begins with our responsibly sourced precious metals.

image description

industry-leading
standards

industry-leading
standards

From our Beyond Conflict Free Diamonds® to the most innovative lab diamonds on the planet, our world class gemologists have been sourcing exceptional diamonds with traceable origins for twenty years.

Yes, this ring can be resized. Brilliant Earth offers one complementary resizing within 60 days of purchase, and up to one year if the new size falls within the recommended sizing range, with free shipping both ways included for the resize.
Yes, this ring is designed for everyday wear. Its low profile and substantial band depth provide strength and a comfortable, snag-free silhouette.
This three-stone setting uses prong-set radiant-cut side diamonds to frame and accentuate the center stone, while a delicate yet sturdy band keeps the overall look classic and balanced. The claw and bead prongs securely hold the accent diamonds and complement a variety of center stone shapes.
This ring can be set with round, princess, cushion, oval, emerald, pear, radiant, asscher, or marquise center stones. Accent gemstones are radiant-cut diamonds and will match the type of center stone you select, natural or lab grown.
A simple polished band or a half-eternity diamond band in the same metal complements this ring for a timeless stack. For a closer fit, choose a contoured or shaped wedding band in the same metal color to harmonize with the ring’s low profile and 2 mm band width.

Last updated on October 14, 2026