Cushion|Lab Grown|IGI

1.00ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG689562161

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG689562161

Diamond specifications and retailer prices

From $188 USD
As of October 30, 2026
Save $903 USD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,091 USD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG689562161 or 689562161. Listed at 13 retailers as of October 30, 2026, with prices from $188 to $1,091, a $903 spread on the same certified stone. Reve Diamonds lists it at $1,091. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
D
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689562161
Dimensions6.60 × 5.40 × 3.63 mm
L/W Ratio1.22
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.60 mm5.40 mm1.00 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689562161
Side View
Table 63.0%Crown 35.5°Girdle: STK-THKPavilion 39°Culet: NoneDepth 67.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $367 USD|Low: $132 USD|High: $1,091 USD|Avg: $527 USD|+4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
October 31, 2026
Retailer 12$188 USD
Retailer 8$322 USD
Retailer 1$367 USD
Retailer 11$373 USD
Retailer 3$404 USD
Retailer 5$405 USD
Retailer 9$449 USD
Retailer 7$515 USD
Retailer 10$542 USD
Retailer 4$590 USD
Retailer 2$723 USD
Retailer 6$978 USD
Reve Diamonds$1,091 USD

42 data points across 13 retailers

13 retailers$188 USD to $1,091 USD

A
Cheapest Retailer
-
$188 USD
Final sale: no returns
B+
Retailer 2
-
$322 USD
View
B+
Retailer 3
-
$367 USD
£289 GBP
View
B+
Retailer 4
-
$373 USD
View
B+
Retailer 5
-
$405 USD
€386 EUR
View
B+
Retailer 6
-
$449 USD
View
Retailer 7
-
$515 USD
View
Price last confirmed 12 days ago
B
Retailer 8
-
$542 USD
View
Retailer 9
-
$590 USD
View
Price last confirmed 20 days ago
B
Retailer 10
-
$590 USD
View
B
Retailer 11
-
$723 USD
View
B
Retailer 12
-
$978 USD
£770 GBP
View
Most Expensive
C
Reve Diamonds
78CCF1F67 · Oct 30
$1,091 USD
View
12 more retailers have this diamond
Prices start from $188 USDSave up to $903 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.00ct Cushion
$188 USD