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Round|Lab Grown|IGI

1.28ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG790612054

Shape and cutting style on the report: Round brilliant

Certificate IGI LG790612054

Diamond specifications and retailer prices

From £1,230 GBP
$1,648 USD
As of October 29, 2026
Save £1,444 GBP (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,339 GBP at Reve Diamonds · As of October 30, 2026
View at Reve 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 LG790612054 or 790612054. Listed at 20 retailers as of October 27, 2026, with a 117% 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 angle33.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790612054
Dimensions7.04 × 7.08 × 4.25 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.04 mm7.08 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790612054
Side View
Table 57.0%Crown 33.3°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £2,014 GBP|Low: £1,181 GBP|High: £4,766 GBP|Avg: £2,179 GBP|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 17£1,230 GBP
Retailer 14£1,239 GBP
Retailer 7£1,338 GBP
Retailer 9£1,377 GBP
Retailer 2£1,427 GBP
Retailer 4£1,427 GBP
Retailer 6£1,522 GBP
Retailer 16£1,552 GBP
Retailer 1£2,014 GBP
Retailer 3£2,242 GBP
Retailer 12£2,254 GBP
Retailer 15£2,460 GBP
Retailer 13£2,530 GBP
Retailer 10£2,623 GBP
Retailer 8£2,674 GBP
Retailer 11£4,097 GBP
Retailer 5£4,766 GBP

44 data points across 17 retailers

20 retailers£1,230 GBP to £2,674 GBP

B+
Cheapest Retailer
-
£1,230 GBP
$1,648 USD
Retailer 2
-
£1,239 GBP
$1,660 USD
View
Price last confirmed 9 days ago
B+
Retailer 3
-
£1,338 GBP
$1,793 USD
View
B+
Retailer 4
-
£1,377 GBP
$1,845 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,427 GBP
$1,912 USD
View
Retailer 6
-
£1,427 GBP
$1,912 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
£1,522 GBP
$2,039 USD
View
B+
Retailer 8
-
£1,552 GBP
$2,080 USD
View
B
Retailer 9
-
£1,643 GBP
HK$17,200 HKD
View
B
Retailer 10
-
£2,014 GBP
View
B
Retailer 11
-
£2,242 GBP
$3,004 USD
View
B
Retailer 12
-
£2,254 GBP
€2,876 EUR
View
B
Retailer 13
-
£2,460 GBP
$3,296 USD
View
B
Retailer 14
-
£2,530 GBP
$3,390 USD
View
B
Retailer 15
-
£2,623 GBP
ZAR 56,770 ZAR
View
B
Retailer 16
-
£2,674 GBP
$3,583 USD
View
Retailer 17
-
£4,097 GBP
View
Price under review
Most Expensive
Reve Diamonds
5B170FEB1 · Oct 30
£4,339 GBP
$5,814 USD
View
Price under review
17 more retailers have this diamond
Prices start from £1,230 GBPSave up to £1,444 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.

B+
1.28ct Round
£1,230 GBP