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Cushion|Lab Grown|IGI

1.88ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG727510778

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG727510778

Diamond specifications and retailer prices

From £370 GBP
$496 USD
As of October 30, 2026
Save £2,511 GBP (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,881 GBP at Brilliant Earth · As of October 30, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG727510778 or 727510778. Listed at 13 retailers as of October 30, 2026, with prices from £370 to £2,881, a £2,511 spread on the same certified stone. Brilliant Earth lists it at £2,881. 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
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG727510778
Dimensions8.08 × 6.70 × 4.59 mm
L/W Ratio1.21
Girdle conditionFaceted
Culet sizePointed
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
8.08 mm6.70 mm1.88 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG727510778
Side View
Table 61.0%Crown 35.7°Girdle: MED-STKPavilion 38.2°Culet: NoneDepth 68.5%

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: Oct 30
Current: £2,881 GBP|Low: £370 GBP|High: £3,426 GBP|Avg: £1,405 GBP|-15.9%
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
October 31, 2026
Retailer 5£370 GBP
Retailer 7£498 GBP
Retailer 13£537 GBP
Retailer 9£592 GBP
Retailer 2£643 GBP
Retailer 3£911 GBP
Retailer 6£959 GBP
Retailer 11£1,101 GBP
Retailer 10£1,515 GBP
Retailer 4£2,428 GBP
Retailer 12£2,444 GBP
Retailer 8£2,672 GBP
Brilliant Earth£2,881 GBP

30 data points across 13 retailers

13 retailers£370 GBP to £2,881 GBP

A
Cheapest Retailer
-
£370 GBP
$496 USD
Final sale: no returns
A
Retailer 2
-
£498 GBP
$667 USD
View
A
Retailer 3
-
£537 GBP
$720 USD
View
A
Retailer 4
-
£592 GBP
$793 USD
View
A
Retailer 5
-
£643 GBP
€821 EUR
View
A
Retailer 6
-
£911 GBP
$1,220 USD
View
A
Retailer 7
-
£959 GBP
A$1,977 AUD
View
A
Retailer 8
-
£1,101 GBP
$1,475 USD
View
B+
Retailer 9
-
£1,515 GBP
View
Retailer 10
-
£2,428 GBP
A$5,005 AUD
View
Price last confirmed 24 days ago
Retailer 11
-
£2,444 GBP
$3,275 USD
View
Price last confirmed 11 days ago
B
Retailer 12
-
£2,672 GBP
$3,580 USD
View
Most Expensive
B
Brilliant Earth
15510545Y · Oct 30
£2,881 GBP
$3,860 USD
View
12 more retailers have this diamond
Prices start from £370 GBPSave up to £2,511 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
1.88ct Cushion
£370 GBP