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Round|Lab Grown|IGI

1.64ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG544247670

Shape and cutting style on the report: Round brilliant

Certificate IGI LG544247670

Diamond specifications and retailer prices

From £263 GBP
$353 USD
As of October 29, 2026
Save £2,080 GBP (89%) vs most expensive(unlock to see where)
18 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 LG544247670 or 544247670. Listed at 18 retailers as of October 29, 2026, with prices from £263 to £2,343, a £2,080 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG544247670
Dimensions7.58 × 7.63 × 4.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.58 mm7.63 mm1.64 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG544247670
Side View
Table 59.5%Crown 34.9°Girdle: MediumPavilion 41.4°Culet: NoneDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £2,343 GBP|Low: £263 GBP|High: £2,343 GBP|Avg: £716 GBP|+0.3%
Do Amore Diamonds
Retailer 2
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Retailer 18
October 30, 2026
Retailer 18£263 GBP
Retailer 15£306 GBP
Retailer 12£322 GBP
Retailer 5£327 GBP
Retailer 14£327 GBP
Retailer 3£404 GBP
Retailer 6£440 GBP
Retailer 7£552 GBP
Retailer 9£565 GBP
Retailer 16£577 GBP
Retailer 11£584 GBP
Retailer 10£633 GBP
Retailer 2£679 GBP
Retailer 17£958 GBP
Retailer 8£989 GBP
Retailer 4£1,160 GBP
Retailer 13£1,417 GBP
Do Amore Diamonds£2,343 GBP

12 data points across 18 retailers

18 retailers£263 GBP to £2,343 GBP

A
Cheapest Retailer
-
£263 GBP
$353 USD
A
Retailer 2
-
£306 GBP
$410 USD
View
B+
Retailer 3
-
£322 GBP
$432 USD
View
A
Retailer 4
-
£327 GBP
$438 USD
View
A
Retailer 5
-
£327 GBP
$438 USD
View
A
Retailer 6
-
£404 GBP
$541 USD
View
A
Retailer 7
-
£440 GBP
$590 USD
View
Retailer 8
-
£552 GBP
$740 USD
View
Price last confirmed 10 days ago
A
Retailer 9
-
£565 GBP
$758 USD
View
A
Retailer 10
-
£577 GBP
$773 USD
View
A
Retailer 11
-
£584 GBP
View
A
Retailer 12
-
£633 GBP
$849 USD
View
A
Retailer 13
-
£679 GBP
$910 USD
View
A
Retailer 14
-
£958 GBP
$1,284 USD
View
A
Retailer 15
-
£989 GBP
$1,325 USD
View
B+
Retailer 16
-
£1,160 GBP
$1,554 USD
View
B+
Retailer 17
-
£1,417 GBP
View
Most Expensive
B
Do Amore Diamonds
27-CA75B31E7 · Oct 31
£2,343 GBP
$3,140 USD
View
17 more retailers have this diamond
Prices start from £263 GBPSave up to £2,080 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
£263 GBP