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Cushion|Lab Grown|IGI

1.55ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG778666726

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG778666726

Diamond specifications and retailer prices

From $4,770 USD
As of October 30, 2026
Save $2,642 USD (36%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $10,592 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.55ct lab-grown cushion diamond

This 1.55ct 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 LG778666726 or 778666726. Listed at 13 retailers as of October 26, 2026, with a 55% 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

1.55
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle30.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778666726
Dimensions8.42 × 5.54 × 3.87 mm
L/W Ratio1.52
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.42 mm5.54 mm1.55 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778666726
Side View
Table 62.0%Crown 34.9°Girdle: STK-VTKPavilion 30.8°Culet: NoneDepth 69.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $10,592 USD|Low: $3,835 USD|High: $19,310 USD|Avg: $9,376 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 9$3,835 USD
Retailer 10$4,770 USD
Retailer 13$4,913 USD
Retailer 2$5,769 USD
Retailer 6$6,597 USD
Retailer 12$7,163 USD
Retailer 8$7,412 USD
Retailer 7$9,352 USD
Retailer 3$9,519 USD
MOH London$10,592 USD
Retailer 11$14,828 USD
Retailer 5$17,472 USD
Retailer 4$18,148 USD

19 data points across 13 retailers

13 retailers$4,770 USD to $7,412 USD

Retailer 1
-
$3,835 USD
Price last confirmed 10 days ago
B
Retailer 2
-
$4,770 USD
View
B
Retailer 3
-
$4,913 USD
View
Final sale: no returns
B
Retailer 4
-
$5,769 USD
£4,542 GBP
View
B
Retailer 5
-
$6,597 USD
£5,194 GBP
View
B
Retailer 6
-
$7,163 USD
£5,640 GBP
View
B
Retailer 7
-
$7,412 USD
View
Retailer 8
-
$9,352 USD
ZAR 151,090 ZAR
View
Price under review
Retailer 9
-
$9,519 USD
View
Price under review
Most Expensive
MOH London
LG778666726 · Oct 29
$10,592 USD
£8,340 GBP
View
Price under review
9 more retailers have this diamond
Prices start from $4,770 USDSave up to $2,642 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
1.55ct Cushion
$4,770 USD