Platinum three stone engagement rings
Make your proposal unforgettable with a beautiful platinum Three Stone engagement ring from our online store. Choose from a variety of styles and designs.
90+ three stone designs
/2_57_LRBC556OFW050_1_12607292022.png)
Carat+
Madison Three-Stone Lab Pear
$ 1,395
Comp. value: $2,000
/2_182_84277-4W2-LAB_1_12606062307.jpeg)
Best Seller
Rosella Three Stone Lab
$ 1,110
Comp. value: $1,590
/2_54_RC9982ENR-14KW_1_12610242234.jpeg)
Carat+
Marni Petite Three-Stone
$ 1,010
Comp. value: $1,450
/2_57_LRBC568OFW045_1_12608220654.png)
New
Capri Pear Three-Stone Lab Diamond (0.45 ct. tw.)
$ 845
Comp. value: $1,210
/2_510_RC3103PS-0.33-4WE-LAB_1_12604111945.png)
Montero Pear Bezel Three-Stone Lab Diamond (.33 ct. tw.)
$ 1,315
Comp. value: $1,890
/2_56_RC10682-4WE-LAB_1_12601131709.jpeg)
Carat+
Classic Three-Stone Lab (½ ct. tw.)
$ 1,130
Comp. value: $1,620
/2_57_LRBC573OFW025_1_12610240355.png)
Color+
Madison Three-Stone Lab Marquise (.25 ct. tw.)
$ 830
Comp. value: $1,190
/2_56_RC10681-4WE-LAB_1_12509291531.jpeg)
Carat+
Classic Three-Stone Pavé Lab (0.67 ct. tw.)
$ 1,130
Comp. value: $1,620
/2_56_SDC10061-4WE_1_12508262318.jpeg)
Meredith Pear Accent
$ 1,080
Comp. value: $1,550
/2_57_LRBC576OFW045_1_12610240355.png)
Color+
Capri Marquise Three-Stone Lab Diamond (0.45 ct. tw.)
$ 810
Comp. value: $1,160
/2_53_31-RCV1038-4WE_1_12603200227.jpeg)
Carat+
Julie Pear Three-Stone Diamond (.10 ct. tw.)
$ 1,370
Comp. value: $1,970
/2_59_EN2R1716SMW-LAB_1_12603310646.jpeg)
Ardora Pear Lab by Christian Siriano
$ 1,300
Comp. value: $1,870
/2_576_AZ-R047-14KW-LAB_1_12610112147.jpeg)
Neria Five-Stone Half Bezel Lab Diamond
$ 2,145
Comp. value: $3,080
/2_53_31-RC10036-4WE_1_12601131835.jpeg)
Presley 3-Stone Pave
$ 1,300
Comp. value: $1,870
/2_56_SDC10244-4WE_LAB_1_12607011531.jpeg)
New
Tria Pavé Princess Lab Accent Three-Stone
$ 1,165
Comp. value: $1,670
/2_170_TS0550-14K-W_1_252507270124.jpeg)
Valette Oval Three-Stone
$ 2,000
Comp. value: $2,870
/2_510_RC3103OV-0.50-4WE-LAB_6_12604080433.png)
Carat+
Montero Oval Bezel Three-Stone Lab Diamond (.50 ct. tw.)
$ 1,350
Comp. value: $1,940
/2_57_LRBC567BSOFW065_1_12609280004.png)
Color+
Capri Sapphire Three-Stone Lab Pavé Pear (0.65 ct. tw.)
$ 935
Comp. value: $1,340
/2_57_RBC558BSFW025_1_12609280003.png)
Color+
Madison Sapphire Three-Stone Pear (0.25 ct. tw.)
$ 830
Comp. value: $1,190
/2_56_SDC10021-4WE_1_12508262036.jpeg)
Kelsey Pear Diamond Three-Stone
$ 1,450
Comp. value: $2,080
/2_53_31-RC11107-4WE_1_12308241643.jpeg)
Luisa Classic 3-Stone
$ 1,030
Comp. value: $1,480
/2_55_9756029_14KW-LAB_1_12508121829.jpeg)
Bellora Grand Tapered Lab Baguette
$ 1,530
Comp. value: $2,200
/2_170_SM0122-14K-W_1_12504091739.jpeg)
Halle Tapered Baguette
$ 2,660
Comp. value: $3,820
/2_53_31-RC230LAB-4WE_1_12610172248.jpeg)
Carat+
Julie Pear Three-Stone Lab Diamond (.50 ct. tw.)
$ 1,100
Comp. value: $1,580
/2_55_9756029_14KW-NAT_1_12508121829.jpeg)
Bellora Grand Tapered Baguette
$ 3,430
Comp. value: $4,930
/2_56_SDC10072-4WE-LAB_1_12606262325.jpeg)
Best Seller
Beth Three-Stone Split Pavé Lab
$ 1,110
Comp. value: $1,590
/2_54_RC9995ENR-14KW-LAB_1_12610172339.jpeg)
Carat+
Stacy Petite Three-Stone Hidden Halo Lab
$ 1,060
Comp. value: $1,520
/2_182_51182-E-4W2_1_12512151552.jpeg)
Aila Three Stone Diamond
$ 1,395
Comp. value: $2,000
/2_53_31-RC121-4WE-lAB_1_12610110327.jpeg)
Brigitte Pavé Lab Diamond
$ 1,030
Comp. value: $1,480
/2_576_AZ-R027-14KW-LAB_1_12610112119.jpeg)
Tavia Wrapped Pavé Lab Diamond
$ 2,100
Comp. value: $3,020
/2_510_RC3103EC-0.50-4WE-LAB_12604080433.png)
Carat+
Montero Emerald-Cut Bezel Three-Stone Lab Diamond (.50 ct. tw.)
$ 1,360
Comp. value: $1,950
/2_54_RC9289ENR-LAB-14KW_1_12504091825.jpeg)
Bryn Trellis Three-Stone Lab
$ 1,470
Comp. value: $2,110
/2_53_31-RC231LAB-4WE_1_12610172253.jpeg)
Carat+
Julie Pear Three-Stone Pavé Lab Diamond (.60 ct. tw.)
$ 1,115
Comp. value: $1,600
/2_182_83364-4W2_1_12512151552.jpeg)
Emmie Three Stone
$ 2,490
Comp. value: $3,580
/2_57_LRBC567PSOFW065_1_12609280004.png)
Color+
Capri Pink Sapphire Three-Stone Lab Pavé Pear (0.65 ct. tw.)
$ 935
Comp. value: $1,340
/2_57_LRBC557OFW010_1_12608110354.png)
Carat+
Madison Three-Stone Lab Pear (.10 ct. tw.)
$ 1,190
Comp. value: $1,710
/2_54_RC3966ENR-14KW_1_12610172337.jpeg)
Carat+
Stacy Three-Stone Hidden Halo Lab Diamond (.25 ct. tw.)
$ 1,005
Comp. value: $1,440
/2_53_31-RC12246ECR-4WE_1_12601131828.jpeg)
Charlene Trapezoid Lab Three-Stone (0.50 ct. tw.)
$ 1,175
Comp. value: $1,690
/2_54_RC9990ENR-14KW_1_12601131814.jpeg)
Princesa Three-Stone
$ 1,120
Comp. value: $1,610
/2_56_SDC10004-4WE_1_12508262039.jpeg)
Taryn Pear 3-Stone With Pavé
$ 1,395
Comp. value: $2,000
/2_55_9760186_14KW_LAB_1_12601131813.jpeg)
Eclipse Half-Moon Lab
$ 2,035
Comp. value: $2,920
/2_56_SDC10245-4WE_LAB_1_12508271502.jpeg)
New
Tria Pavé Oval Lab Accent Three-Stone
$ 1,165
Comp. value: $1,670
/2_57_LRBC567YSOFW065_1_12609280005.png)
Color+
Capri Yellow Sapphire Three-Stone Lab Pavé Pear (0.65 ct. tw.)
$ 935
Comp. value: $1,340
/2_55_9760179_14KW_1_12508121823.jpeg)
Bellora Bezel-Set Tapered Baguette
$ 1,680
Comp. value: $2,410
/2_56_SDC10222-4WE_LAB_1_12610242317.jpeg)
New
Tria Pavé Round Lab Accent Three-Stone
$ 1,135
Comp. value: $1,630
/2_53_31-RC220LAB-4WE_1_12610110344.jpeg)
Brigitte Three-Stone Lab Diamond (0.25 ct. tw.)
$ 935
Comp. value: $1,340
/2_57_RBC558YSFW025_1_12609280002.png)
Color+
Madison Yellow Sapphire Three-Stone Pear (0.25 ct. tw.)
$ 830
Comp. value: $1,190
/2_54_RC1475MR-LAB-14KW_4_12601131825.jpeg)
Ojo Lab
$ 1,615
Comp. value: $2,320
Compare 100s of designs
Browse our full catalogue of settings designs to choose the one that suits your style
Have a design of your own?
Explore more diamond and ring options
Get $100 off
Stay up to date with exclusive deals, price alerts, gemologist tips, and more!
Minimum purchase required.
By signing up you agree to our Terms.