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Cushion|Lab Grown|IGI

1.61ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG523278357

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG523278357

Diamond specifications and retailer prices

From £154 GBP
$206 USD
As of November 1, 2026
Save £700 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £854 GBP at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1.61ct lab-grown cushion diamond

This 1.61ct lab-grown cushion sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG523278357 or 523278357. Listed at 14 retailers as of November 1, 2026, with prices from £154 to £854, a £700 spread on the same certified stone. Reve Diamonds lists it at £854. 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

1.61
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle30.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG523278357
Dimensions7.54 × 6.05 × 4.08 mm
L/W Ratio1.25
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Blue 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
7.54 mm6.05 mm1.61 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG523278357
Side View
Table 58.0%Crown 35.8°Girdle: MED-THKPavilion 30.4°Culet: NoneDepth 67.4%

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: Nov 1
Current: £798 GBP|Low: £154 GBP|High: £821 GBP|Avg: £423 GBP|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 2£154 GBP
Retailer 9£171 GBP
Retailer 7£230 GBP
Retailer 5£281 GBP
Retailer 4£309 GBP
Retailer 3£338 GBP
Retailer 6£405 GBP
Retailer 11£422 GBP
Retailer 8£619 GBP
Retailer 1£798 GBP
Retailer 10£799 GBP

43 data points across 11 retailers

14 retailers£154 GBP to £854 GBP

A
Cheapest Retailer
-
£154 GBP
$206 USD
Final sale: no returns
Retailer 2
-
£171 GBP
$229 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
£230 GBP
$308 USD
View
A
Retailer 4
-
£281 GBP
€358 EUR
View
A
Retailer 5
-
£309 GBP
View
A
Retailer 6
-
£338 GBP
$453 USD
View
A
Retailer 7
-
£393 GBP
$526 USD
View
A
Retailer 8
-
£405 GBP
$542 USD
View
A
Retailer 9
-
£422 GBP
$566 USD
View
B+
Retailer 10
-
£589 GBP
$789 USD
View
Retailer 11
-
£619 GBP
$830 USD
View
B+
Retailer 12
-
£798 GBP
View
B
Retailer 13
-
£799 GBP
$1,070 USD
View
Most Expensive
B
Reve Diamonds
EF81FED1D · Nov 1
£854 GBP
$1,144 USD
View
13 more retailers have this diamond
Prices start from £154 GBPSave up to £700 GBP

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
1.61ct Cushion
£154 GBP