40th Anniversary Sale · Up to 30% Off · Shop Now

Free Shipping · 0% APR Monthly Financing & Layaway

Since 1986 · Custom Design Your Dream Ring

Round Cut Engagement Rings

Discover why the round brilliant cut remains the world’s most iconic diamond shape. Explore handcrafted round engagement rings at Jewelry Couture in Ventura, CA, featuring solitaires, halos, and split-shanks. Enjoy complimentary ring sizing on every order.

Filters0

Simon G. MR2358 18K White Gold Round Baguette Diamond Engagement Ring with Milgrain

Simon G. MR2358 18K White Gold Round Baguette Diamond Engagement Ring with Milgrain

MR2358 WHITE 18K SEMI 1

Simon G. MR2358 18K White Gold Round Baguette Diamond Engagement Ring with Milgrain

From $9,380.00 USD

Simon G. MR2477 18K Gold Round Pave Double Halo Diamond Engagement Ring

Simon G. MR2477 18K Gold Round Pave Double Halo Diamond Engagement Ring

MR2477 WHITE 18K SEMI YELLOW

Simon G. MR2477 18K Gold Round Pave Double Halo Diamond Engagement Ring

From $5,370.00 USD

Simon G. MR2514 18K Gold Round Criss-Cross Diamond Engagement Ring

Simon G. MR2514 18K Gold Round Criss-Cross Diamond Engagement Ring

MR2514 WHITE 18K SEMI 1

Simon G. MR2514 18K Gold Round Criss-Cross Diamond Engagement Ring

From $3,660.00 USD

Simon G. MR2624 18K Gold Round Halo Diamond Engagement Ring

Simon G. MR2624 18K Gold Round Halo Diamond Engagement Ring

MR2624 WHITE 18K SEMI 1

Simon G. MR2624 18K Gold Round Halo Diamond Engagement Ring

From $6,670.00 USD

Simon G. MR2646 18K White Gold Round Diamond Engagement Ring with Rose Gold Accents

Simon G. MR2646 18K White Gold Round Diamond Engagement Ring with Rose Gold Accents

MR2646 WHITE 18K SEMI 1

Simon G. MR2646 18K White Gold Round Diamond Engagement Ring with Rose Gold Accents

Simon G. MR2711 18K White Gold Round Simon-Set Princess and Baguette Diamond Engagement Ring

Simon G. MR2711 18K White Gold Round Simon-Set Princess and Baguette Diamond Engagement Ring

MR2711_WHITE_18K_SEMI_1

Simon G. MR2711 18K White Gold Round Simon-Set Princess and Baguette Diamond Engagement Ring

From $19,670.00 USD

Simon G. MR4089 18K Gold Round Flower Halo Diamond Engagement Ring

Simon G. MR4089 18K Gold Round Flower Halo Diamond Engagement Ring

MR4089_WHITE_18K_SEMI_1

Simon G. MR4089 18K Gold Round Flower Halo Diamond Engagement Ring

From $6,960.00 USD

Simon G. NR109 18K White Gold Round and Princess Diamond Halo Engagement Ring

Simon G. NR109 18K White Gold Round and Princess Diamond Halo Engagement Ring

NR109 WHITE 18K SEMI 1

Simon G. NR109 18K White Gold Round and Princess Diamond Halo Engagement Ring

From $8,560.00 USD

Simon G. TR160 18K White Gold Round Intricate Halo Diamond Engagement Ring

Simon G. TR160 18K White Gold Round Intricate Halo Diamond Engagement Ring

Simon G. TR160 18K White Gold Round Intricate Halo Diamond Engagement Ring

Simon G. TR160 18K White Gold Round Intricate Halo Diamond Engagement Ring

Simon G. TR446 18K Gold Round Three Stone Halo Diamond Engagement Ring

Simon G. TR446 18K Gold Round Three Stone Halo Diamond Engagement Ring

TR446 WHITE 18K SEMI 2T

Simon G. TR446 18K Gold Round Three Stone Halo Diamond Engagement Ring

From $6,870.00 USD

Simon G. TR549 18K Gold Round Vintage Halo Diamond Engagement Ring

Simon G. TR549 18K Gold Round Vintage Halo Diamond Engagement Ring

TR549 WHITE 18K SEMI 1

Simon G. TR549 18K Gold Round Vintage Halo Diamond Engagement Ring

From $3,110.00 USD

Simon G. TR629 18K White Gold Round Vintage Halo Diamond Engagement Ring

Simon G. TR629 18K White Gold Round Vintage Halo Diamond Engagement Ring

TR629 WHITE 18K SEMI 1

Simon G. TR629 18K White Gold Round Vintage Halo Diamond Engagement Ring

From $4,760.00 USD

Simon G. MR1686 18K Gold Round Diamond Engagement Ring and Wedding Band Set

Simon G. MR1686 18K Gold Round Diamond Engagement Ring and Wedding Band Set

MR1686 WHITE 18K SET ROSE

Simon G. MR1686 18K Gold Round Diamond Engagement Ring and Wedding Band Set

From $4,730.00 USD

Simon G. MR2247-A 18K White Gold Round Three Stone Halo Diamond and Sapphire Engagement Ring

Simon G. MR2247-A 18K White Gold Round Three Stone Halo Diamond and Sapphire Engagement Ring

MR2247-A WHITE 18K SEMI 1

Simon G. MR2247-A 18K White Gold Round Three Stone Halo Diamond and Sapphire Engagement Ring

From $5,280.00 USD

Simon G. MR1842-A 18K Gold Round Halo Engagement Ring and Wedding Band Set

Simon G. MR1842-A 18K Gold Round Halo Engagement Ring and Wedding Band Set

MR1842-A WHITE 18K SET 1

Simon G. MR1842-A 18K Gold Round Halo Engagement Ring and Wedding Band Set

From $5,830.00 USD

Simon G. MR2173-D 18K White Gold Round Cut Engagement Ring and Wedding Band Set

Simon G. MR2173-D 18K White Gold Round Cut Engagement Ring and Wedding Band Set

Simon G. MR2173-D 18K White Gold Round Cut Engagement Ring and Wedding Band Set

Simon G. MR2173-D 18K White Gold Round Cut Engagement Ring and Wedding Band Set

From $4,710.00 USD

Simon G. LR2835 18K White Gold Round Hidden Halo Diamond Engagement Ring

Simon G. LR2835 18K White Gold Round Hidden Halo Diamond Engagement Ring

LR2835 WHITE 18K SEMI 1

Simon G. LR2835 18K White Gold Round Hidden Halo Diamond Engagement Ring

Simon G. MR1498 18K Gold Round Criss-Cross Diamond Engagement Ring

Simon G. MR1498 18K Gold Round Criss-Cross Diamond Engagement Ring

MR1498_WHITE_18K_SEMI_1

Simon G. MR1498 18K Gold Round Criss-Cross Diamond Engagement Ring

Simon G. MR2425 18K White Gold Round Simon-Set Diamond Engagement Ring

Simon G. MR2425 18K White Gold Round Simon-Set Diamond Engagement Ring

MR2425 WHITE 18K SEMI 1

Simon G. MR2425 18K White Gold Round Simon-Set Diamond Engagement Ring

From $9,240.00 USD

Simon G. TR128 18K White Gold Round Halo Engagement Ring and Wedding Band Set

Simon G. TR128 18K White Gold Round Halo Engagement Ring and Wedding Band Set

TR128 WHITE 18K SET 1

Simon G. TR128 18K White Gold Round Halo Engagement Ring and Wedding Band Set

From $5,880.00 USD

Simon G. TR738 18K Gold Round Diamond Engagement Ring with Pave Band

Simon G. TR738 18K Gold Round Diamond Engagement Ring with Pave Band

TR738 WHITE 18K SEMI YELLOW

Simon G. TR738 18K Gold Round Diamond Engagement Ring with Pave Band

From $4,100.00 USD

Simon G. MR2691 18K White Gold Round Simon-Set Diamond Engagement Ring

Simon G. MR2691 18K White Gold Round Simon-Set Diamond Engagement Ring

MR2691 WHITE 18K SEMI 1

Simon G. MR2691 18K White Gold Round Simon-Set Diamond Engagement Ring

From $10,760.00 USD

Simon G. LR2601 18K Gold Round Cut Vintage-Inspired Engagement Ring and Wedding Band Set

Simon G. LR2601 18K Gold Round Cut Vintage-Inspired Engagement Ring and Wedding Band Set

LR2601 WHITE 18K SEMI YELLOW

Simon G. LR2601 18K Gold Round Cut Vintage-Inspired Engagement Ring and Wedding Band Set

Simon G. LR2595 Classic Straight Diamond Round Engagement Ring in 18K Gold

Simon G. LR2595 Classic Straight Diamond Round Engagement Ring in 18K Gold

LR2595 WHITE 18K SEMI 1

Simon G. LR2595 Classic Straight Diamond Round Engagement Ring in 18K Gold

From $3,770.00 USD

Simon G. LR2372 Three-Side Pave Round Diamond Engagement Ring in 18K Gold

Simon G. LR2372 Three-Side Pave Round Diamond Engagement Ring in 18K Gold

LR2372_WHITE_18K_SEMI_2

Simon G. LR2372 Three-Side Pave Round Diamond Engagement Ring in 18K Gold

From $4,980.00 USD

Simon G. LR2931 Cathedral Milgrain Two-Tone Round Diamond Engagement Ring in 18K Gold

Simon G. LR2931 Cathedral Milgrain Two-Tone Round Diamond Engagement Ring in 18K Gold

Simon G. LR3006 Bubble Setting Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3006 Bubble Setting Round Diamond Engagement Ring in 18K White Gold

LR3006 WHITE 18K SEMI WHITE 2

Simon G. LR3006 Bubble Setting Round Diamond Engagement Ring in 18K White Gold

From $5,500.00 USD

Simon G. MR4090-A Art Deco Halo Baguette Sunburst Round Diamond Engagement Ring in 18K White Gold

Simon G. MR4090-A Art Deco Halo Baguette Sunburst Round Diamond Engagement Ring in 18K White Gold

MR4090-A WHITE 18K X WHITE 2

Simon G. MR4090-A Art Deco Halo Baguette Sunburst Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3074 Extended Cluster Halo Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3074 Extended Cluster Halo Round Diamond Engagement Ring in 18K White Gold

Simon G. LR2198 Diamond Row Shank Round Engagement Ring in 18K Gold

Simon G. LR2198 Diamond Row Shank Round Engagement Ring in 18K Gold

LR2198 WHITE 18K SEMI 1

Simon G. LR2198 Diamond Row Shank Round Engagement Ring in 18K Gold

From $7,000.00 USD

Simon G. LR2224 Full Diamond Shank Round Engagement Ring in 18K Gold

Simon G. LR2224 Full Diamond Shank Round Engagement Ring in 18K Gold

From $6,690.00 USD

Simon G. LR2599 Full Diamond Shank Round Engagement Ring in 18K Gold

Simon G. LR2599 Full Diamond Shank Round Engagement Ring in 18K Gold

From $6,760.00 USD

Simon G. LR2989 Diamond Rich Round Engagement Ring in 18K White Gold

Simon G. LR2989 Diamond Rich Round Engagement Ring in 18K White Gold

Simon G. LR3180 Infinity Twist Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3180 Infinity Twist Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3181 Criss-Cross Twist Baguette Diamond Engagement Ring in 18K White Gold

Simon G. LR3181 Criss-Cross Twist Baguette Diamond Engagement Ring in 18K White Gold

Simon G. LR3182 Split Shank Twist Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3182 Split Shank Twist Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3184 Criss-Cross Round Diamond Engagement Ring in 18K Yellow Gold

Simon G. LR3184 Criss-Cross Round Diamond Engagement Ring in 18K Yellow Gold

Simon G. LR3183 Art Deco Swirl Round Diamond Engagement Ring in 18K White Gold

Simon G. LR3183 Art Deco Swirl Round Diamond Engagement Ring in 18K White Gold

Simon G. LR2600 Round Diamond Bold Modern Engagement Ring in 18K Gold

Simon G. LR2600 Round Diamond Bold Modern Engagement Ring in 18K Gold

LR2600 WHITE 18K SEMI 1

Simon G. LR2600 Round Diamond Bold Modern Engagement Ring in 18K Gold

From $9,330.00 USD

Simon G. LR2507-RD Round Diamond Half-Pave Engagement Ring in 18K Gold

Simon G. LR2507-RD Round Diamond Half-Pave Engagement Ring in 18K Gold

LR2507-RD_WHITE_18K_SEMI_ROSE

Simon G. LR2507-RD Round Diamond Half-Pave Engagement Ring in 18K Gold

Simon G. LR2489 Round-cut Halo Engagement Ring in 18k Gold with Diamonds

Round-Cut Halo Engagement Ring In 18k Gold With Diamonds

From $6,960.00 USD

Simon G. MR3005 Round-cut Split-Shank Engagement Ring and Matching Wedding Band in 18k Gold with Diamonds

Simon G. MR3005 Round-cut Split-Shank Engagement Ring and Matching Wedding Band in 18k Gold with Diamonds

MR3005_WHITE_18K_SEMI

Round-cut Split-Shank Engagement Ring & Matching Wedding Band in 18k Gold with Diamonds

From $7,130.00 USD

Simon G. LR2596 Round-cut Engagement Ring in 18k Gold with Diamonds

Simon G. LR2596 Round-cut Engagement Ring in 18k Gold with Diamonds

LR2596 WHITE 18K SEMI YELLOW

Round-Cut Engagement Ring In 18k Gold With Diamonds

From $4,910.00 USD

Visit Our Ventura Showroom

More In Store

What you see online is only part of our collection. We have many more pieces in our showroom. Tell us what you're looking for, or get in touch with our team.

Contact Us