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Cushion|Lab Grown|IGI

1.00ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG689561775

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG689561775

Diamond specifications and retailer prices

From $188 USD
As of October 31, 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 November 1, 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 top-tier cut grade and certified by IGI LG689561775 or 689561775. Listed at 13 retailers as of October 31, 2026, with prices from $188 to $1,091, a $903 spread on the same certified stone. Reve Diamonds lists it at $1,091. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.00
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle43.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689561775
Dimensions6.04 × 6.01 × 3.97 mm
L/W Ratio1.00
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
6.04 mm6.01 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689561775
Side View
Table 62.0%Crown 36.6°Girdle: MED-THKPavilion 43.7°Culet: NoneDepth 66.1%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: $973 USD|Low: $132 USD|High: $1,091 USD|Avg: $506 USD|+0.7%
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
November 1, 2026
Retailer 12$188 USD
Retailer 11$208 USD
Retailer 7$322 USD
Retailer 5$370 USD
Retailer 10$373 USD
Retailer 6$401 USD
Retailer 4$404 USD
Retailer 8$449 USD
Retailer 9$542 USD
Retailer 3$580 USD
Retailer 2$723 USD
Retailer 1$973 USD
Reve Diamonds$1,091 USD

45 data points across 13 retailers

13 retailers$188 USD to $1,091 USD

A
Cheapest Retailer
-
$188 USD
Final sale: no returns
Retailer 2
-
$208 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$322 USD
View
A
Retailer 4
-
$370 USD
£291 GBP
View
A
Retailer 5
-
$373 USD
View
B+
Retailer 6
-
$401 USD
€382 EUR
View
Retailer 7
-
$404 USD
£318 GBP
View
Price last confirmed 18 days ago
B+
Retailer 8
-
$449 USD
View
B
Retailer 9
-
$542 USD
View
B+
Retailer 10
-
$580 USD
View
B
Retailer 11
-
$723 USD
View
B
Retailer 12
-
$973 USD
£766 GBP
View
Most Expensive
B
Reve Diamonds
C99BFAB20 · Nov 1
$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