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1.64ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • GIA 6505255842

Shape and cutting style on the report: Round brilliant

Certificate GIA 6505255842

Diamond specifications and retailer prices

From £954 GBP
$1,278 USD
As of October 31, 2026
2 retailers carry this diamond
Most expensive: £2,276 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505255842. Listed at 2 retailers as of October 31, 2026. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 6505255842
Dimensions7.55 × 7.58 × 4.66 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Growth Remnant
Top View
7.55 mm7.58 mm1.64 ctG / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505255842
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: £2,276 GBP|Low: £721 GBP|High: £2,276 GBP|Avg: £1,125 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
July 31, 2026
Retailer 3£721 GBP
Retailer 2£954 GBP
Do Amore Diamonds£2,276 GBP

2 data points across 3 retailers

2 retailers

B
Cheapest Retailer
-
£954 GBP
$1,278 USD
Most Expensive
Do Amore Diamonds
24-2412-124AA · Oct 31
£2,276 GBP
$3,050 USD
View
Price under review
1 more retailer has this diamond
Prices start from £954 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
1.64ct Round
£954 GBP