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Round|Lab Grown|IGI

1.64ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG625480546

Shape and cutting style on the report: Round brilliant

Certificate IGI LG625480546

Diamond specifications and retailer prices

From £173 GBP
$232 USD
As of October 30, 2026
Save £1,310 GBP (88%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,483 GBP at Do Amore Diamonds · As of November 2, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG625480546 or 625480546. Listed at 13 retailers as of October 30, 2026, with prices from £173 to £1,483, a £1,310 spread on the same certified stone. Do Amore Diamonds lists it at £1,483. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG625480546
Dimensions7.49 × 7.46 × 4.72 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
7.49 mm7.46 mm1.64 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG625480546
Side View
Table 58.0%Crown 36.1°Girdle: MediumPavilion 41.3°Culet: NoneDepth 63.1%

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 30
Current: £1,483 GBP|Low: £141 GBP|High: £1,483 GBP|Avg: £556 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 2026
Retailer 7£173 GBP
Retailer 9£284 GBP
Retailer 6£331 GBP
Retailer 8£386 GBP
Retailer 2£390 GBP
Retailer 5£544 GBP
Retailer 4£617 GBP
Retailer 3£846 GBP
Do Amore Diamonds£1,483 GBP

40 data points across 9 retailers

13 retailers£173 GBP to £1,483 GBP

A
Cheapest Retailer
-
£173 GBP
$232 USD
Final sale: no returns
Retailer 2
-
£192 GBP
$257 USD
View
Price last confirmed 31 days ago
A
Retailer 3
-
£192 GBP
$257 USD
View
A
Retailer 4
-
£284 GBP
$381 USD
View
B+
Retailer 5
-
£331 GBP
$444 USD
View
B+
Retailer 6
-
£386 GBP
$518 USD
View
A
Retailer 7
-
£390 GBP
View
Retailer 8
-
£544 GBP
$730 USD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
£617 GBP
$828 USD
View
Retailer 10
-
£679 GBP
$911 USD
View
Price last confirmed 26 days ago
B
Retailer 11
-
£679 GBP
$911 USD
View
B
Retailer 12
-
£846 GBP
View
Most Expensive
B
Do Amore Diamonds
27-F85E13E20 · Nov 2
£1,483 GBP
$1,990 USD
View
12 more retailers have this diamond
Prices start from £173 GBPSave up to £1,310 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
£173 GBP