Round|Lab Grown|IGI

1.28ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG799676989

Shape and cutting style on the report: Round brilliant

Certificate IGI LG799676989

Diamond specifications and retailer prices

From £476 GBP
$634 USD
As of October 29, 2026
Save £1,932 GBP (80%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,228 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799676989 or 799676989. Listed at 21 retailers as of October 29, 2026, with a 406% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799676989
Dimensions7.02 × 7.05 × 4.29 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
HEARTS & ARROWS 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
7.02 mm7.05 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799676989
Side View
Table 57.0%Crown 34.1°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.9%

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 29
Current: £4,228 GBP|Low: £476 GBP|High: £4,461 GBP|Avg: £1,296 GBP|-5.2%
Do Amore Diamonds
Retailer 2
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Retailer 21
October 30, 2026
Retailer 7£476 GBP
Retailer 21£518 GBP
Retailer 3£520 GBP
Retailer 8£533 GBP
Retailer 5£553 GBP
Retailer 9£553 GBP
Retailer 20£687 GBP
Retailer 4£730 GBP
Retailer 19£759 GBP
Retailer 6£904 GBP
Retailer 13£974 GBP
Retailer 2£1,037 GBP
Retailer 16£1,121 GBP
Retailer 17£1,190 GBP
Retailer 18£1,412 GBP
Retailer 12£1,715 GBP
Retailer 10£1,923 GBP
Retailer 14£2,186 GBP
Retailer 11£2,206 GBP
Retailer 15£2,408 GBP
Do Amore Diamonds£4,228 GBP

29 data points across 21 retailers

21 retailers£476 GBP to £2,408 GBP

A
Cheapest Retailer
-
£476 GBP
$634 USD
A
Retailer 2
-
£518 GBP
$690 USD
View
A
Retailer 3
-
£520 GBP
$693 USD
View
A
Retailer 4
-
£533 GBP
$710 USD
View
Final sale: no returns
A
Retailer 5
-
£553 GBP
$736 USD
View
Retailer 6
-
£553 GBP
$736 USD
View
Price last confirmed 13 days ago
B+
Retailer 7
-
£687 GBP
$915 USD
View
B+
Retailer 8
-
£730 GBP
$972 USD
View
B+
Retailer 9
-
£759 GBP
HK$7,900 HKD
View
B+
Retailer 10
-
£904 GBP
$1,204 USD
View
B+
Retailer 11
-
£974 GBP
View
B+
Retailer 12
-
£1,037 GBP
View
B+
Retailer 13
-
£1,121 GBP
ZAR 24,124 ZAR
View
Retailer 14
-
£1,190 GBP
$1,585 USD
View
Price last confirmed 8 days ago
B+
Retailer 15
-
£1,412 GBP
$1,880 USD
View
B
Retailer 16
-
£1,715 GBP
$2,284 USD
View
B
Retailer 17
-
£1,923 GBP
$2,560 USD
View
B
Retailer 18
-
£2,186 GBP
$2,911 USD
View
B
Retailer 19
-
£2,206 GBP
SGD 3,969 SGD
View
B
Retailer 20
-
£2,408 GBP
View
Most Expensive
Do Amore Diamonds
27-43C1B51C2 · Oct 30
£4,228 GBP
$5,630 USD
View
Price under review
20 more retailers have this diamond
Prices start from £476 GBPSave up to £1,932 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 Round
£476 GBP