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Round|Lab Grown|IGI

1.64ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG12279308

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12279308

Diamond specifications and retailer prices

From £322 GBP
$432 USD
As of October 30, 2026
Save £2,021 GBP (86%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,343 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.64ct lab-grown round diamond

This 1.64ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12279308 or 12279308. Listed at 11 retailers as of October 30, 2026, with prices from £322 to £2,343, a £2,021 spread on the same certified stone. Do Amore Diamonds lists it at £2,343. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.64
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12279308
Dimensions7.59 × 7.61 × 4.64 mm
L/W Ratio1.00
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.
Top View
7.59 mm7.61 mm1.64 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12279308
Side View
Table 59.5%Crown 35°Girdle: MediumPavilion 41°Culet: NoneDepth 61.1%

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: £2,343 GBP|Low: £322 GBP|High: £2,343 GBP|Avg: £840 GBP|+0.3%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 5£322 GBP
Retailer 8£404 GBP
Retailer 9£440 GBP
Retailer 11£565 GBP
Retailer 4£584 GBP
Retailer 3£633 GBP
Retailer 2£672 GBP
Retailer 7£958 GBP
Retailer 10£989 GBP
Retailer 6£1,411 GBP
Do Amore Diamonds£2,343 GBP

10 data points across 11 retailers

11 retailers£322 GBP to £2,343 GBP

B+
Cheapest Retailer
-
£322 GBP
$432 USD
A
Retailer 2
-
£404 GBP
$541 USD
View
A
Retailer 3
-
£440 GBP
$590 USD
View
A
Retailer 4
-
£565 GBP
$758 USD
View
A
Retailer 5
-
£584 GBP
View
A
Retailer 6
-
£633 GBP
$849 USD
View
A
Retailer 7
-
£672 GBP
$900 USD
View
A
Retailer 8
-
£958 GBP
$1,284 USD
View
A
Retailer 9
-
£989 GBP
$1,325 USD
View
B+
Retailer 10
-
£1,411 GBP
View
Most Expensive
B
Do Amore Diamonds
27-DBBFF0559 · Oct 31
£2,343 GBP
$3,140 USD
View
10 more retailers have this diamond
Prices start from £322 GBPSave up to £2,021 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
1.64ct Round
£322 GBP