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Cushion|Lab Grown|IGI

1.00ct D SI2 Cushion Lab Grown Diamond

GD • D/SI2 • IGI LG500148231

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG500148231

Diamond specifications and retailer prices

From $230 USD
As of October 30, 2026
Save $885 USD (79%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,115 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI LG500148231 or 500148231. Listed at 6 retailers as of October 30, 2026, with prices from $230 to $1,115, a $885 spread on the same certified stone. MOH London lists it at $1,115. 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
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle29.1°
Pavilion angle32.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500148231
Dimensions6.19 × 5.65 × 3.42 mm
L/W Ratio1.10
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
6.19 mm5.65 mm1.00 ctD / SI2
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG500148231
Side View
Table 59.0%Crown 29.1°Girdle: STK-THKPavilion 32.4°Culet: NoneDepth 60.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,115 USD|Low: $230 USD|High: $1,128 USD|Avg: $545 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 6$230 USD
Retailer 4$437 USD
Retailer 3$440 USD
Retailer 2$518 USD
Retailer 5$563 USD
MOH London$1,115 USD

42 data points across 6 retailers

6 retailers$230 USD to $1,115 USD

B+
Cheapest Retailer
-
$230 USD
B+
Retailer 2
-
$437 USD
View
B+
Retailer 3
-
$440 USD
View
B
Retailer 4
-
$518 USD
£408 GBP
View
B
Retailer 5
-
$563 USD
View
Most Expensive
C
MOH London
LG500148231 · Nov 1
$1,115 USD
£878 GBP
View
5 more retailers have this diamond
Prices start from $230 USDSave up to $885 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.

B+
1.00ct Cushion
$230 USD