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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.

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Gabriel & Co. Rainier Cushion Halo Round Diamond Engagement Ring in 14K White Gold

Gabriel & Co. Rainier Cushion Halo Round Diamond Engagement Ring in 14K White Gold

Gabriel & Co. Rainier Cushion Halo Round Diamond Engagement Ring in 14K White Gold

Gabriel & Co. Rainier Cushion Halo Round Diamond Engagement Ring in 14K White Gold

Tacori Round with Marquise Bloom Diamond Engagement Ring with Cathedral Crown

Tacori Round with Marquise Bloom Diamond Engagement Ring - Cathedral Crown

Tacori Round with Oval Bloom Diamond Engagement Ring with Cathedral Crown

Tacori Round with Oval Bloom Diamond Engagement Ring - Cathedral Crown

Tacori Round with Pear Bloom Diamond Engagement Ring with Cathedral Crown

Tacori Round with Pear Bloom Diamond Engagement Ring - Cathedral Crown

Tacori Round Cushion Three-Stone Sapphire and Diamond Engagement Ring

Tacori Round Cushion Three-Stone Sapphire and Diamond Engagement Ring

Tacori Round Cushion Three Stone Sapphire Diamond Engagement Ring

Tacori Round Cushion Three Stone Sapphire Diamond Engagement Ring

Tacori Round with Cushion Bloom Three-Stone Engagement Ring

Tacori Round with Cushion Bloom Three-Stone Engagement Ring

Tacori Round Three-Stone Diamond Engagement Ring

Tacori Round Three-Stone Diamond Engagement Ring

Tacori Round Three-Stone Diamond Engagement Ring

Tacori Round Three-Stone Diamond Engagement Ring

Tacori Round Solitaire Diamond Engagement Ring

Tacori Round Solitaire Diamond Engagement Ring

Tacori Round Solitaire Diamond Engagement Ring

Tacori Round Solitaire Diamond Engagement Ring

Simply Tacori Round Brilliant Engagement Ring with Cushion Bloom

Simply Tacori Round Brilliant Engagement Ring with Cushion Bloom

Simply Tacori Round Brilliant Engagement Ring with Cushion Bloom

Simply Tacori Round Brilliant Engagement Ring with Cushion Bloom

Tacori Round Bloom Diamond Engagement Ring from the Petite Crescent Collection

Tacori Round Bloom Diamond Engagement Ring from the Petite Crescent Collection

Tacori Round Bloom Diamond Engagement Ring - Petite Crescent Collection

Tacori Round Bloom Diamond Engagement Ring - Petite Crescent Collection

Simon G. LR1100 18K White Gold Round Halo Diamond Ring

Simon G. LR1100 18K White Gold Round Halo Diamond Ring

Simon G. LP2356 18K White Gold Round Graduated Diamond Engagement Ring with Rose Gold Accent

Simon G. LP2356 18K White Gold Round Graduated Diamond Engagement Ring with Rose Gold Accent

LP2356 WHITE 18K SEMI 1

Simon G. LP2356 18K White Gold Round Graduated Diamond Engagement Ring with Rose Gold Accent

Simon G. LP2380 18K Gold Round Three-Row Diamond Engagement Ring and Wedding Band Set

Simon G. LP2380 18K Gold Round Three-Row Diamond Engagement Ring and Wedding Band Set

Simon G. LP2380 18K Gold Round Three-Row Diamond Engagement Ring and Wedding Band Set

Simon G. LP2380 18K Gold Round Three-Row Diamond Engagement Ring and Wedding Band Set

From $10,560.00 USD

Simon G. LR1083 18K Gold Round Diamond Engagement Ring and Double-Layer Wedding Band Set

Simon G. LR1083 18K Gold Round Diamond Engagement Ring and Double-Layer Wedding Band Set

LR1083_WHITE_18K_SET_1

Simon G. LR1083 18K Gold Round Diamond Engagement Ring and Double-Layer Wedding Band Set

Simon G. LR2207 18K White Gold Round Criss-Cross Diamond Engagement Ring

Simon G. LR2207 18K White Gold Round Criss-Cross Diamond Engagement Ring

Simon G. LR2207 18K White Gold Round Criss-Cross Diamond Engagement Ring

Simon G. LR2207 18K White Gold Round Criss-Cross Diamond Engagement Ring

Simon G. LR2350 18K White Gold Round Hidden Halo Diamond Engagement Ring

Simon G. LR2350 18K White Gold Round Hidden Halo Diamond Engagement Ring

Simon G. LR2350 18K White Gold Round Hidden Halo Diamond Engagement Ring

Simon G. LR2350 18K White Gold Round Hidden Halo Diamond Engagement Ring

From $3,520.00 USD

Simon G. LR2637 18K White Gold Round Three-Stone Diamond Engagement Ring and Wedding Band Set

Simon G. LR2637 18K White Gold Round Three-Stone Diamond Engagement Ring and Wedding Band Set

LR2637 WHITE 18K SET 1

Simon G. LR2637 18K White Gold Round Three-Stone Diamond Engagement Ring and Wedding Band Set

From $2,800.00 USD

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

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

LR2833 WHITE 18K SEMI 1

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

From $2,730.00 USD

Simon G. MR1577-D 18K White Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1577-D 18K White Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

MR1577 WHITE 18K SEMI

Simon G. MR1577-D 18K White Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1596 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1596 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1596 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1596 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

From $5,610.00 USD

Simon G. MR1840-A 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. MR1840-A 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

MR1840-A WHITE 18K SET 1

Simon G. MR1840-A 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

From $5,720.00 USD

Simon G. MR1907 18K Gold Round Diamond Engagement Ring and Wedding Band Set

Simon G. MR1907 18K Gold Round Diamond Engagement Ring and Wedding Band Set

MR1907 WHITE 18K SET 1

Simon G. MR1907 18K Gold Round Diamond Engagement Ring and Wedding Band Set

From $7,840.00 USD

Simon G. MR2132 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. MR2132 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. MR2132 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. MR2132 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

From $6,380.00 USD

Simon G. MR2220 18K Gold Round Baguette Diamond Engagement Ring and Wedding Band Set

Simon G. MR2220 18K Gold Round Baguette Diamond Engagement Ring and Wedding Band Set

MR2220 WHITE 18K SET 1

Simon G. MR2220 18K Gold Round Baguette Diamond Engagement Ring and Wedding Band Set

Simon G. MR2399 18K Gold Round and Marquise Diamond Engagement Ring and Wedding Band Set

Simon G. MR2399 18K Gold Round and Marquise Diamond Engagement Ring and Wedding Band Set

MR2399 WHITE 18K SET 1

Simon G. MR2399 18K Gold Round and Marquise Diamond Engagement Ring and Wedding Band Set

From $6,760.00 USD

Simon G. MR2459 18K White Gold Round Double Halo Diamond Engagement Ring and Wedding Band Set

Simon G. MR2459 18K White Gold Round Double Halo Diamond Engagement Ring and Wedding Band Set

MR2459 WHITE 18K SET 1

Simon G. MR2459 18K White Gold Round Double Halo Diamond Engagement Ring and Wedding Band Set

From $6,230.00 USD

Simon G. MR2461 18K White Gold Round Double Halo Diamond Engagement Ring and Wedding Band Set

Simon G. MR2461 18K White Gold Round Double Halo Diamond Engagement Ring and Wedding Band Set

MR2461_WHITE_18K_SET_1

Simon G. MR2461 18K White Gold Round Double Halo Diamond Engagement Ring and Wedding Band Set

From $1,480.00 USD

Simon G. MR2566 18K Gold Round Vintage Milgrain Diamond Engagement Ring and Wedding Band Set

Simon G. MR2566 18K Gold Round Vintage Milgrain Diamond Engagement Ring and Wedding Band Set

Simon G. MR2566 18K Gold Round Vintage Milgrain Diamond Engagement Ring and Wedding Band Set

Simon G. MR2566 18K Gold Round Vintage Milgrain Diamond Engagement Ring and Wedding Band Set

From $7,920.00 USD

Simon G. MR3058 18K Gold Round Diamond Engagement Ring and Wedding Band Set

Simon G. MR3058 18K Gold Round Diamond Engagement Ring and Wedding Band Set

MR3058 2T 18K SET 1

Simon G. MR3058 18K Gold Round Diamond Engagement Ring and Wedding Band Set

From $4,730.00 USD

Simon G. NR468 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. NR468 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. NR468 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

Simon G. NR468 18K Gold Round Halo Diamond Engagement Ring and Wedding Band Set

From $5,350.00 USD

Simon G. PR108 18K Gold Round Diamond Engagement Ring and Wedding Band Set

Simon G. PR108 18K Gold Round Diamond Engagement Ring and Wedding Band Set

PR108 WHITE 18K SET YELLOW

Simon G. PR108 18K Gold Round Diamond Engagement Ring and Wedding Band Set

Simon G. TR431 18K Gold Round Diamond Engagement Ring and Wedding Band Set

Simon G. TR431 18K Gold Round Diamond Engagement Ring and Wedding Band Set

TR431_WHITE_18K_SET_1

Simon G. TR431 18K Gold Round Diamond Engagement Ring and Wedding Band Set

From $7,110.00 USD

Simon G. TR473 18K Gold Round Trellis Floral Diamond Engagement Ring and Wedding Band Set

Simon G. TR473 18K Gold Round Trellis Floral Diamond Engagement Ring and Wedding Band Set

TR473_WHITE_18K_SET_1

Simon G. TR473 18K Gold Round Trellis Floral Diamond Engagement Ring and Wedding Band Set

From $6,380.00 USD

Simon G. LP2304 18K Gold Round Criss-Cross Openwork Diamond Engagement Ring

Simon G. LP2304 18K Gold Round Criss-Cross Openwork Diamond Engagement Ring

Simon G. LP2304 18K Gold Round Criss-Cross Openwork Diamond Engagement Ring

Simon G. LP2304 18K Gold Round Criss-Cross Openwork Diamond Engagement Ring

From $5,200.00 USD

Simon G. LR1164 18K White Gold Round Baguette and Diamond Halo Engagement Ring

Simon G. LR1164 18K White Gold Round Baguette and Diamond Halo Engagement Ring

LR1164 WHITE 18K SEMI 1

Simon G. LR1164 18K White Gold Round Baguette and Diamond Halo Engagement Ring

From $11,640.00 USD

Simon G. LR2113 18K White Gold Round Criss-Cross Diamond Engagement Ring

Simon G. LR2113 18K White Gold Round Criss-Cross Diamond Engagement Ring

LR2113 WHITE 18K SEMI 1

Simon G. LR2113 18K White Gold Round Criss-Cross Diamond Engagement Ring

From $3,440.00 USD

Simon G. LR2125 18K White Gold Round Criss-Cross Openwork Diamond Engagement Ring

Simon G. LR2125 18K White Gold Round Criss-Cross Openwork Diamond Engagement Ring

LR2125 WHITE 18K SEMI 1

Simon G. LR2125 18K White Gold Round Criss-Cross Openwork Diamond Engagement Ring

From $6,100.00 USD

Simon G. LR2143 18K Gold Round Intricate Six-Prong Diamond Engagement Ring

Simon G. LR2143 18K Gold Round Intricate Six-Prong Diamond Engagement Ring

LR2143 WHITE 18K SEMI

Simon G. LR2143 18K Gold Round Intricate Six-Prong Diamond Engagement Ring

From $3,080.00 USD

Simon G. LR2800 18K White Gold Round Graduated Diamond Engagement Ring

Simon G. LR2800 18K White Gold Round Graduated Diamond Engagement Ring

Simon G. LR2800 18K White Gold Round Graduated Diamond Engagement Ring

Simon G. LR2800 18K White Gold Round Graduated Diamond Engagement Ring

From $10,960.00 USD

Simon G. MR1394 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1394 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1394 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR1394 18K Gold Round Criss-Cross Diamond Engagement Ring and Wedding Band Set

Simon G. MR2100 18K Gold Round Vintage Floral Diamond Engagement Ring

Simon G. MR2100 18K Gold Round Vintage Floral Diamond Engagement Ring

MR2100 WHITE 18K SEMI 2T

Simon G. MR2100 18K Gold Round Vintage Floral Diamond Engagement Ring

From $2,140.00 USD

Simon G. MR2141 18K White Gold Round Princess and Round Diamond Engagement Ring

Simon G. MR2141 18K White Gold Round Princess and Round Diamond Engagement Ring

MR2141_WHITE_18K_SEMI_1

Simon G. MR2141 18K White Gold Round Princess and Round Diamond Engagement Ring

From $10,540.00 USD

Simon G. MR2248 18K Gold Round Vintage Split Shank Diamond Engagement Ring

Simon G. MR2248 18K Gold Round Vintage Split Shank Diamond Engagement Ring

MR2248 WHITE 18K SEMI 1

Simon G. MR2248 18K Gold Round Vintage Split Shank Diamond Engagement Ring

From $5,990.00 USD

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