Round|Lab Grown|IGI

1.65ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG514249714

Shape and cutting style on the report: Round brilliant

Certificate IGI LG514249714

Diamond specifications and retailer prices

From £268 GBP
$359 USD
As of November 1, 2026
Save £1,166 GBP (81%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,381 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.65ct lab-grown round diamond

This 1.65ct 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 IGI LG514249714 or 514249714. Listed at 19 retailers as of November 1, 2026, with a 435% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.65
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514249714
Dimensions7.57 × 7.61 × 4.70 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
7.57 mm7.61 mm1.65 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514249714
Side View
Table 58.0%Crown 35.5°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.9%

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: £2,381 GBP|Low: £268 GBP|High: £2,381 GBP|Avg: £777 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 18
Retailer 19
November 1, 2026
Retailer 18£268 GBP
Retailer 16£311 GBP
Retailer 14£332 GBP
Retailer 4£333 GBP
Retailer 15£333 GBP
Retailer 19£333 GBP
Retailer 6£444 GBP
Retailer 7£534 GBP
Retailer 17£582 GBP
Retailer 9£591 GBP
Retailer 13£596 GBP
Retailer 11£649 GBP
Retailer 12£654 GBP
Retailer 5£975 GBP
Retailer 8£1,034 GBP
Retailer 3£1,180 GBP
Retailer 10£1,294 GBP
Retailer 2£1,434 GBP
Do Amore Diamonds£2,381 GBP

16 data points across 19 retailers

19 retailers£268 GBP to £1,434 GBP

A
Cheapest Retailer
-
£268 GBP
$359 USD
A
Retailer 2
-
£311 GBP
$417 USD
View
B+
Retailer 3
-
£332 GBP
$445 USD
View
Retailer 4
-
£333 GBP
$446 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£333 GBP
$446 USD
View
A
Retailer 6
-
£333 GBP
$446 USD
View
B+
Retailer 7
-
£444 GBP
$595 USD
View
Retailer 8
-
£534 GBP
$715 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
£582 GBP
$780 USD
View
B+
Retailer 10
-
£591 GBP
$791 USD
View
B+
Retailer 11
-
£596 GBP
View
B+
Retailer 12
-
£649 GBP
$869 USD
View
B+
Retailer 13
-
£654 GBP
View
B
Retailer 14
-
£975 GBP
$1,307 USD
View
B
Retailer 15
-
£1,034 GBP
$1,386 USD
View
B
Retailer 16
-
£1,180 GBP
$1,581 USD
View
B
Retailer 17
-
£1,294 GBP
$1,734 USD
View
B
Retailer 18
-
£1,434 GBP
View
Most Expensive
Do Amore Diamonds
27-9917A8657 · Oct 31
£2,381 GBP
$3,190 USD
View
Price under review
18 more retailers have this diamond
Prices start from £268 GBPSave up to £1,166 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
1.65ct Round
£268 GBP