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Round|Lab Grown|IGI

1.56ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG821640683

Shape and cutting style on the report: Round brilliant

Certificate IGI LG821640683

Diamond specifications and retailer prices

From £444 GBP
$595 USD
As of November 1, 2026
Save £2,064 GBP (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,508 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.56ct lab-grown round diamond

This 1.56ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG821640683 or 821640683. Listed at 11 retailers as of October 31, 2026, with prices from £444 to £2,508, a £2,064 spread on the same certified stone. Brilliant Earth lists it at £2,508. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.56
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821640683
Dimensions7.47 × 7.43 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.47 mm7.43 mm1.56 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821640683
Side View
Table 57.0%Crown 33°Girdle: MediumPavilion 41.3°Culet: NoneDepth 61.7%

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: Nov 1
Current: £2,508 GBP|Low: £444 GBP|High: £2,508 GBP|Avg: £886 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7£444 GBP
Retailer 4£523 GBP
Retailer 3£591 GBP
Retailer 8£690 GBP
Retailer 5£1,035 GBP
Retailer 9£1,097 GBP
Retailer 2£1,297 GBP
Retailer 6£1,470 GBP
Brilliant Earth£2,508 GBP

41 data points across 9 retailers

11 retailers£444 GBP to £2,508 GBP

A
Cheapest Retailer
-
£444 GBP
$595 USD
A
Retailer 2
-
£523 GBP
€668 EUR
View
A
Retailer 3
-
£591 GBP
View
B+
Retailer 4
-
£690 GBP
$924 USD
View
B+
Retailer 5
-
£1,035 GBP
A$2,134 AUD
View
B
Retailer 6
-
£1,097 GBP
$1,470 USD
View
B+
Retailer 7
-
£1,297 GBP
View
B
Retailer 8
-
£1,412 GBP
$1,892 USD
View
Retailer 9
-
£1,470 GBP
$1,970 USD
View
Price last confirmed 15 days ago
Retailer 10
-
£1,470 GBP
$1,970 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
22200268A · Oct 31
£2,508 GBP
$3,360 USD
View
10 more retailers have this diamond
Prices start from £444 GBPSave up to £2,064 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
1.56ct Round
£444 GBP