Free Expedited Shipping + Free Returns.

Design
Your Ring

Choose Diamond

Choose Setting

Complete your Ring

Filters

Delivery Date

Diamond Shape

Shape is the silhouette of a diamond when viewed from the top. Diamonds are commonly available in 10 different shapes.
Round Princess Emerald Asscher Oval Marquise Cushion Radiant Pear Heart
Oscar1

85% of diamonds sold are round, princess and cushion shapes. Currently trending? Ovals and emeralds.

Learn More

Diamond Price

Carat Weight

Cut Grade

Color Grade

Clarity Grade

Advanced Options

Showing 16,467 round si1  diamonds

Best sellers
Most viewed
Best sparkle
Shape Carat Cut Color Clarity Polish Sym. Fluor. Table Depth Culet L/W Agency Price
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
58.0Table
61.1Depth
NCulet
1.01L/W
GIAAgency
$3,921Price

0.9 Carat Round Diamond

SKUD-7W9JYF
PolishExcellent
SymmetryExcellent
Fluor.None
Table58.0%
Depth61.1%
CuletNone
GirdleSlightly Thick to Slightly Thick
LxW Ratio1.01
Measurements6.23mm x 6.18mm x 3.79mm
$3,921
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
56.0Table
62.9Depth
NCulet
1.00L/W
GIAAgency
$4,138Price

0.9 Carat Round Diamond

SKUD-7MR2Q5
PolishExcellent
SymmetryExcellent
Fluor.None
Table56.0%
Depth62.9%
CuletNone
GirdleMedium to Medium
LxW Ratio1.0
Measurements6.17mm x 6.15mm x 3.88mm
$4,138
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
59.0Table
60.9Depth
NCulet
1.01L/W
GIAAgency
$5,999Price

1.01 Carat Round Diamond

SKUD-7W9FF1
PolishExcellent
SymmetryExcellent
Fluor.None
Table59.0%
Depth60.9%
CuletNone
GirdleSlightly Thick to Slightly Thick
LxW Ratio1.01
Measurements6.47mm x 6.43mm x 3.92mm
$5,999
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
60.0Table
60.6Depth
NCulet
1.00L/W
GIAAgency
$6,143Price

1.01 Carat Round Diamond

SKUD-R2WQSQ
PolishExcellent
SymmetryExcellent
Fluor.None
Table60.0%
Depth60.6%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements6.52mm x 6.49mm x 3.94mm
$6,143
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
61.0Table
60.8Depth
NCulet
1.01L/W
GIAAgency
$6,249Price

1.0 Carat Round Diamond

SKUD-N3PJ7P
PolishExcellent
SymmetryExcellent
Fluor.None
Table61.0%
Depth60.8%
CuletNone
GirdleSlightly Thick to Slightly Thick
LxW Ratio1.01
Measurements6.47mm x 6.42mm x 3.91mm
$6,249
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
58.0Table
63.3Depth
NCulet
1.01L/W
GIAAgency
$6,781Price

1.0 Carat Round Diamond

SKUD-RVSS5W
PolishExcellent
SymmetryExcellent
Fluor.None
Table58.0%
Depth63.3%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements6.38mm x 6.34mm x 4.02mm
$6,781
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
58.0Table
61.7Depth
NCulet
1.01L/W
GIAAgency
$9,803Price

1.5 Carat Round Diamond

SKUD-5P9173
PolishExcellent
SymmetryExcellent
Fluor.None
Table58.0%
Depth61.7%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements7.38mm x 7.33mm x 4.54mm
$9,803
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
56.0Table
62.7Depth
NCulet
1.00L/W
GIAAgency
$9,949Price

1.5 Carat Round Diamond

SKUD-RMS25S
PolishExcellent
SymmetryExcellent
Fluor.None
Table56.0%
Depth62.7%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements7.30mm x 7.27mm x 4.57mm
$9,949
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
59.0Table
61.5Depth
NCulet
1.01L/W
GIAAgency
$10,847Price

1.52 Carat Round Diamond

SKUD-R9JW0F
PolishExcellent
SymmetryExcellent
Fluor.None
Table59.0%
Depth61.5%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements7.37mm x 7.33mm x 4.52mm
$10,847
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.2Depth
NCulet
1.01L/W
GIAAgency
$11,024Price

1.5 Carat Round Diamond

SKUD-79SQ50
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.2%
CuletNone
GirdleMedium to Medium
LxW Ratio1.01
Measurements7.34mm x 7.30mm x 4.56mm
$11,024
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
61.0Table
61.2Depth
NCulet
1.01L/W
GIAAgency
$11,142Price

1.62 Carat Round Diamond

SKUD-7JQ35J
PolishExcellent
SymmetryExcellent
Fluor.None
Table61.0%
Depth61.2%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements7.56mm x 7.52mm x 4.61mm
$11,142
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.4Depth
NCulet
1.01L/W
GIAAgency
$11,371Price

1.57 Carat Round Diamond

SKUD-2WMV1X
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.4%
CuletNone
GirdleSlightly Thick to Slightly Thick
LxW Ratio1.01
Measurements7.43mm x 7.39mm x 4.63mm
$11,371
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
60.0Table
60.5Depth
NCulet
1.00L/W
GIAAgency
$11,407Price

1.53 Carat Round Diamond

SKUD-RS1Q91
PolishExcellent
SymmetryExcellent
Fluor.None
Table60.0%
Depth60.5%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements7.44mm x 7.41mm x 4.50mm
$11,407
Diamond Shape
IdealCut
GColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
54.0Table
62.1Depth
NCulet
1.01L/W
GIAAgency
$11,602Price

1.59 Carat Round Diamond

SKUD-QFNSNY
PolishExcellent
SymmetryExcellent
Fluor.None
Table54.0%
Depth62.1%
CuletNone
GirdleMedium to Medium
LxW Ratio1.01
Measurements7.52mm x 7.47mm x 4.66mm
$11,602
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
59.0Table
60.3Depth
NCulet
1.00L/W
GIAAgency
$11,604Price

1.5 Carat Round Diamond

SKUD-R35225
PolishExcellent
SymmetryExcellent
Fluor.None
Table59.0%
Depth60.3%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements7.44mm x 7.41mm x 4.48mm
$11,604
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
56.0Table
62.8Depth
NCulet
1.00L/W
GIAAgency
$12,007Price

1.53 Carat Round Diamond

SKUD-RMP1J1
PolishExcellent
SymmetryExcellent
Fluor.None
Table56.0%
Depth62.8%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements7.33mm x 7.30mm x 4.59mm
$12,007
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
56.0Table
62.7Depth
NCulet
1.01L/W
GIAAgency
$4,294Price

0.91 Carat Round Diamond

SKUD-7H2MS1
PolishExcellent
SymmetryExcellent
Fluor.None
Table56.0%
Depth62.7%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements6.18mm x 6.14mm x 3.87mm
$4,294
Diamond Shape
IdealCut
FColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.5Depth
NCulet
1.00L/W
GIAAgency
$4,338Price

0.9 Carat Round Diamond

SKUD-7HYH08
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.5%
CuletNone
GirdleThin to Medium
LxW Ratio1.0
Measurements6.17mm x 6.15mm x 3.85mm
$4,338
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.5Depth
NCulet
1.00L/W
GIAAgency
$5,241Price

1.02 Carat Round Diamond

SKUD-7P357X
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.5%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements6.44mm x 6.41mm x 4.02mm
$5,241
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.8Depth
NCulet
1.01L/W
GIAAgency
$5,341Price

1.0 Carat Round Diamond

SKUD-7RHW32
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.8%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements6.40mm x 6.36mm x 4.00mm
$5,341
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
58.0Table
62.7Depth
NCulet
1.00L/W
GIAAgency
$5,514Price

1.0 Carat Round Diamond

SKUD-7Q2H5F
PolishExcellent
SymmetryExcellent
Fluor.None
Table58.0%
Depth62.7%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements6.37mm x 6.34mm x 3.98mm
$5,514
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.4Depth
NCulet
1.00L/W
GIAAgency
$5,571Price

1.01 Carat Round Diamond

SKUD-7WS7N8
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.4%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements6.41mm x 6.38mm x 3.99mm
$5,571
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
55.0Table
62.9Depth
NCulet
1.01L/W
GIAAgency
$5,574Price

1.0 Carat Round Diamond

SKUD-7R3Y30
PolishExcellent
SymmetryExcellent
Fluor.None
Table55.0%
Depth62.9%
CuletNone
GirdleThin to Medium
LxW Ratio1.01
Measurements6.39mm x 6.34mm x 4.01mm
$5,574
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
60.0Table
61.3Depth
NCulet
1.01L/W
GIAAgency
$5,768Price

1.01 Carat Round Diamond

SKUD-7HS35Q
PolishExcellent
SymmetryExcellent
Fluor.None
Table60.0%
Depth61.3%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.01
Measurements6.50mm x 6.46mm x 3.97mm
$5,768
Diamond Shape
IdealCut
HColor
SI1Clarity
EXPolish
EXSym.
NoneFluor.
57.0Table
62.7Depth
NCulet
1.00L/W
GIAAgency
$5,837Price

1.02 Carat Round Diamond

SKUD-70N1MK
PolishExcellent
SymmetryExcellent
Fluor.None
Table57.0%
Depth62.7%
CuletNone
GirdleMedium to Slightly Thick
LxW Ratio1.0
Measurements6.42mm x 6.39mm x 4.01mm
$5,837
 One moment please...

Choose from our varied range of Round Cut, Si1 diamonds so you can build the perfect wedding ring, pendant, or pair of diamond earrings. All Ritani diamonds have been examined by a third party rating agency, and come with a thorough certificate that guarantees their 4C grades are proper. After you select the stone that's right for you, complete your ring with a style from our diverse selection of ring settings, from simple solitaires to sparkling Art Deco-inspired halos. If you prefer assistance along the way, you may engage with our virtual gemologist or customer service team. When you've chosen your diamond or wedding ring, you can select to preview it in-person, for free, at one of our US based, local partner jewelers, from Sacramento, CA to New York City.


Chat Now