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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 €617 EUR
$689 USD
As of October 31, 2026
Save €3,152 EUR (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €5,576 EUR 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 31, 2026, with a 511% 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 31
Current: €3,768 EUR|Low: €617 EUR|High: €5,388 EUR|Avg: €1,985 EUR|-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
November 1, 2026
Retailer 12€617 EUR
Retailer 9€674 EUR
Retailer 13€797 EUR
Retailer 16€1,048 EUR
Retailer 10€1,062 EUR
Retailer 11€1,146 EUR
Retailer 15€1,175 EUR
Retailer 17€1,439 EUR
Retailer 6€1,480 EUR
Retailer 5€1,992 EUR
Retailer 3€2,210 EUR
Retailer 14€2,335 EUR
Retailer 7€2,431 EUR
Retailer 2€2,969 EUR
Retailer 8€3,263 EUR
Retailer 4€3,426 EUR
Brilliant Earth€3,768 EUR

26 data points across 17 retailers

19 retailers€617 EUR to €3,768 EUR

A+
Cheapest Retailer
-
€617 EUR
$689 USD
Final sale: no returns
Retailer 2
-
€674 EUR
$753 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
€797 EUR
$890 USD
View
A
Retailer 4
-
€1,048 EUR
$1,171 USD
View
A
Retailer 5
-
€1,062 EUR
£934 GBP
View
A
Retailer 6
-
€1,146 EUR
View
A
Retailer 7
-
€1,175 EUR
ZAR 21,214 ZAR
View
A
Retailer 8
-
€1,439 EUR
$1,608 USD
View
A
Retailer 9
-
€1,480 EUR
$1,654 USD
View
B+
Retailer 10
-
€1,992 EUR
£1,752 GBP
View
B+
Retailer 11
-
€2,095 EUR
$2,341 USD
View
B+
Retailer 12
-
€2,210 EUR
$2,469 USD
View
B+
Retailer 13
-
€2,335 EUR
$2,609 USD
View
B+
Retailer 14
-
€2,431 EUR
SGD 3,670 SGD
View
B+
Retailer 15
-
€2,969 EUR
£2,612 GBP
View
Retailer 16
-
€3,263 EUR
$3,645 USD
View
Price last confirmed 11 days ago
B+
Retailer 17
-
€3,426 EUR
$3,828 USD
View
B
Retailer 18
-
€3,768 EUR
$4,210 USD
View
Most Expensive
Brilliant Earth
20988015A · Sep 28
€5,576 EUR
$6,230 USD
View
Price last confirmed 33 days ago
18 more retailers have this diamond
Prices start from €617 EURSave up to €3,152 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+
1.88ct Cushion
€617 EUR