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Cushion|Lab Grown|IGI

1.00ct D IF Cushion Lab Grown Diamond

GD • D/IF • IGI LG620421921

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG620421921

Diamond specifications and retailer prices

From €252 EUR
$281 USD
As of October 31, 2026
Save €1,064 EUR (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,316 EUR at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG620421921 or 620421921. Listed at 15 retailers as of October 30, 2026, with prices from €252 to €1,316, a €1,064 spread on the same certified stone. Brilliant Earth lists it at €1,316. 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
IF
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620421921
Dimensions6.62 × 5.30 × 3.72 mm
L/W Ratio1.25
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
6.62 mm5.30 mm1.00 ctD / IF
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620421921
Side View
Table 58.0%Crown 34.6°Girdle: STK-THKPavilion 39.7°Culet: NoneDepth 70.2%

Caratlytics Score

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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 31
Current: €1,316 EUR|Low: €179 EUR|High: €1,826 EUR|Avg: €669 EUR|-27.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 31, 2026
Retailer 8€252 EUR
Retailer 3€279 EUR
Retailer 15€376 EUR
Retailer 9€421 EUR
Retailer 11€465 EUR
Retailer 13€479 EUR
Retailer 4€497 EUR
Retailer 5€499 EUR
Retailer 2€531 EUR
Retailer 14€679 EUR
Retailer 10€703 EUR
Retailer 6€943 EUR
Retailer 7€958 EUR
Retailer 12€1,124 EUR
Brilliant Earth€1,316 EUR

40 data points across 15 retailers

15 retailers€252 EUR to €1,316 EUR

A
Cheapest Retailer
-
€252 EUR
$281 USD
Final sale: no returns
A
Retailer 2
-
€376 EUR
$420 USD
View
A
Retailer 3
-
€421 EUR
$470 USD
View
A
Retailer 4
-
€465 EUR
View
A
Retailer 5
-
€479 EUR
ZAR 8,654 ZAR
View
A
Retailer 6
-
€497 EUR
$555 USD
View
A
Retailer 7
-
€499 EUR
$557 USD
View
A
Retailer 8
-
€531 EUR
£468 GBP
View
B+
Retailer 9
-
€679 EUR
A$1,167 AUD
View
B+
Retailer 10
-
€703 EUR
$785 USD
View
B+
Retailer 11
-
€943 EUR
$1,054 USD
View
B
Retailer 12
-
€977 EUR
$1,092 USD
View
B
Retailer 13
-
€1,124 EUR
£989 GBP
View
Retailer 14
-
€1,254 EUR
A$2,156 AUD
View
Price last confirmed 145 days ago
Most Expensive
B
Brilliant Earth
11245142A · Oct 30
€1,316 EUR
$1,470 USD
View
14 more retailers have this diamond
Prices start from €252 EURSave up to €1,064 EUR

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
€252 EUR