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Cushion|Lab Grown|IGI

1.88ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG811638305

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

Certificate IGI LG811638305

Diamond specifications and retailer prices

From $751 USD
As of October 30, 2026
Save $3,459 USD (82%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $6,230 USD at Brilliant Earth · As of September 28, 2026
View at Brilliant Earth

About this 1.88ct lab-grown cushion diamond

This 1.88ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811638305 or 811638305. Listed at 19 retailers as of October 30, 2026, with a 461% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.88
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle36.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811638305
Dimensions7.11 × 7.01 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.11 mm7.01 mm1.88 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811638305
Side View
Table 62.0%Crown 34.7°Girdle: MED-STKPavilion 36.6°Culet: NoneDepth 65.6%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: $4,210 USD|Low: $689 USD|High: $6,020 USD|Avg: $2,231 USD|-30.1%
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
Retailer 16
Retailer 17
October 30, 2026
Retailer 13$751 USD
Retailer 9$753 USD
Retailer 14$880 USD
Retailer 15$1,171 USD
Retailer 2$1,197 USD
Retailer 10$1,288 USD
Retailer 12$1,313 USD
Retailer 16$1,608 USD
Retailer 6$1,654 USD
Retailer 4$2,225 USD
Retailer 5$2,438 USD
Retailer 17$2,469 USD
Retailer 7$2,716 USD
Retailer 11$3,335 USD
Retailer 8$3,645 USD
Retailer 3$3,828 USD
Brilliant Earth$4,210 USD

27 data points across 17 retailers

19 retailers$751 USD to $4,210 USD

A+
Cheapest Retailer
-
$751 USD
Final sale: no returns
Retailer 2
-
$753 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
$880 USD
View
A
Retailer 4
-
$1,171 USD
View
A
Retailer 5
-
$1,197 USD
£942 GBP
View
A
Retailer 6
-
$1,288 USD
€1,227 EUR
View
A
Retailer 7
-
$1,313 USD
ZAR 21,214 ZAR
View
A
Retailer 8
-
$1,608 USD
View
A
Retailer 9
-
$1,654 USD
View
B+
Retailer 10
-
$2,225 USD
£1,752 GBP
View
B+
Retailer 11
-
$2,341 USD
View
B+
Retailer 12
-
$2,438 USD
View
B+
Retailer 13
-
$2,469 USD
View
B+
Retailer 14
-
$2,716 USD
SGD 3,670 SGD
View
B+
Retailer 15
-
$3,335 USD
£2,626 GBP
View
Retailer 16
-
$3,645 USD
View
Price last confirmed 9 days ago
B+
Retailer 17
-
$3,828 USD
View
B
Retailer 18
-
$4,210 USD
View
Most Expensive
Brilliant Earth
20988015A · Sep 28
$6,230 USD
View
Price last confirmed 31 days ago
18 more retailers have this diamond
Prices start from $751 USDSave up to $3,459 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+
1.88ct Cushion
$751 USD