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Cushion|Lab Grown|IGI

1.89ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846662378

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846662378

Diamond specifications and retailer prices

From £533 GBP
As of October 30, 2026
Save £2,632 GBP (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,164 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.89ct lab-grown cushion diamond

This 1.89ct 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 LG846662378 or 846662378. Listed at 11 retailers as of October 30, 2026, with prices from £533 to £3,164, a £2,632 spread on the same certified stone. Brilliant Earth lists it at £3,164. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.89
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846662378
Dimensions7.98 × 6.63 × 4.57 mm
L/W Ratio1.20
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
7.98 mm6.63 mm1.89 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846662378
Side View
Table 61.0%Crown 35.4°Girdle: STK-THKPavilion 37.7°Culet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
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 30
Current: £3,164 GBP|Low: £533 GBP|High: £3,164 GBP|Avg: £1,566 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 9£533 GBP
Retailer 2£605 GBP
Retailer 6£608 GBP
Retailer 8£775 GBP
Retailer 10£1,186 GBP
Retailer 5£1,222 GBP
Retailer 7£1,741 GBP
Retailer 4£1,833 GBP
Retailer 11£2,506 GBP
Retailer 3£2,739 GBP
Brilliant Earth£3,164 GBP

15 data points across 11 retailers

11 retailers£533 GBP to £3,164 GBP

A
Cheapest Retailer
-
£533 GBP
A
Retailer 2
-
£605 GBP
$810 USD
View
A
Retailer 3
-
£608 GBP
$815 USD
View
A
Retailer 4
-
£775 GBP
$1,039 USD
View
A
Retailer 5
-
£1,186 GBP
€1,514 EUR
View
A
Retailer 6
-
£1,222 GBP
$1,637 USD
View
B+
Retailer 7
-
£1,741 GBP
$2,333 USD
View
B+
Retailer 8
-
£1,833 GBP
$2,456 USD
View
B+
Retailer 9
-
£2,506 GBP
View
Retailer 10
-
£2,739 GBP
$3,670 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
22155369A · Oct 30
£3,164 GBP
$4,240 USD
View
10 more retailers have this diamond
Prices start from £533 GBPSave up to £2,632 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
1.89ct Cushion
£533 GBP