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Cushion|Lab Grown|IGI

1.55ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG674547147

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG674547147

Diamond specifications and retailer prices

From $225 USD
As of October 29, 2026
Save $974 USD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,199 USD at Reve Diamonds · As of October 28, 2026
View at Reve Diamonds

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG674547147 or 674547147. Listed at 15 retailers as of October 28, 2026, with prices from $225 to $1,199, a $974 spread on the same certified stone. Reve Diamonds lists it at $1,199. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle42°
OriginLab Grown
Grading LabIGI
CertificateIGI LG674547147
Dimensions6.81 × 6.48 × 4.48 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.81 mm6.48 mm1.55 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG674547147
Side View
Table 62.0%Crown 36.1°Girdle: MED-STKPavilion 42°Culet: NoneDepth 69.1%

Caratlytics Score

How it works →
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 29
Current: $225 USD|Low: $225 USD|High: $1,199 USD|Avg: $679 USD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Reve Diamonds
October 29, 2026
Retailer 1$225 USD
Retailer 10$282 USD
Retailer 7$322 USD
Retailer 2$355 USD
Retailer 9$407 USD
Retailer 8$457 USD
Retailer 5$496 USD
Retailer 12$644 USD
Retailer 3$814 USD
Retailer 4$857 USD
Retailer 13$960 USD
Retailer 11$1,080 USD
Retailer 6$1,175 USD
Reve Diamonds$1,199 USD

38 data points across 14 retailers

15 retailers$225 USD to $1,199 USD

A
Cheapest Retailer
-
$225 USD
Final sale: no returns
A
Retailer 2
-
$282 USD
HK$2,200 HKD
View
A
Retailer 3
-
$322 USD
£253 GBP
View
B+
Retailer 4
-
$355 USD
View
A
Retailer 5
-
$407 USD
€388 EUR
View
A
Retailer 6
-
$457 USD
£360 GBP
View
A
Retailer 7
-
$496 USD
View
B+
Retailer 8
-
$644 USD
View
B+
Retailer 9
-
$814 USD
SGD 1,100 SGD
View
B+
Retailer 10
-
$857 USD
View
B+
Retailer 11
-
$960 USD
View
B
Retailer 12
-
$1,080 USD
View
B
Retailer 13
-
$1,100 USD
View
B
Retailer 14
-
$1,175 USD
£925 GBP
View
Most Expensive
B
Reve Diamonds
EF5D41078 · Oct 28
$1,199 USD
View
14 more retailers have this diamond
Prices start from $225 USDSave up to $974 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
1.55ct Cushion
$225 USD