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Cushion|Lab Grown|IGI

1.28ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG843667683

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG843667683

Diamond specifications and retailer prices

From £310 GBP
As of October 30, 2026
Save £1,638 GBP (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,948 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG843667683 or 843667683. Listed at 11 retailers as of October 30, 2026, with prices from £310 to £1,948, a £1,638 spread on the same certified stone. Do Amore Diamonds lists it at £1,948. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843667683
Dimensions8.53 × 5.37 × 3.53 mm
L/W Ratio1.59
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
8.53 mm5.37 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843667683
Side View
Table 57.0%Crown 33.9°Girdle: MED-STKPavilion 31.6°Culet: NoneDepth 65.7%

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: £1,948 GBP|Low: £271 GBP|High: £2,381 GBP|Avg: £987 GBP|-18.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 6£310 GBP
Retailer 10£388 GBP
Retailer 11£446 GBP
Retailer 2£497 GBP
Retailer 3£513 GBP
Retailer 8£730 GBP
Retailer 9£1,146 GBP
Retailer 7£1,210 GBP
Retailer 4£1,329 GBP
Retailer 5£1,403 GBP
Do Amore Diamonds£1,948 GBP

17 data points across 11 retailers

11 retailers£310 GBP to £1,948 GBP

A
Cheapest Retailer
-
£310 GBP
A
Retailer 2
-
£388 GBP
$520 USD
View
A
Retailer 3
-
£446 GBP
$597 USD
View
A
Retailer 4
-
£497 GBP
€634 EUR
View
A
Retailer 5
-
£513 GBP
$687 USD
View
A
Retailer 6
-
£730 GBP
A$1,504 AUD
View
B+
Retailer 7
-
£1,146 GBP
$1,535 USD
View
B+
Retailer 8
-
£1,210 GBP
View
B
Retailer 9
-
£1,329 GBP
A$2,739 AUD
View
B+
Retailer 10
-
£1,403 GBP
$1,880 USD
View
Most Expensive
B
Do Amore Diamonds
27-5C60E91B3 · Oct 31
£1,948 GBP
$2,610 USD
View
10 more retailers have this diamond
Prices start from £310 GBPSave up to £1,638 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
1.28ct Cushion
£310 GBP