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Round|Lab Grown|IGI

1.71ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG799635486

Shape and cutting style on the report: Round brilliant

Certificate IGI LG799635486

Diamond specifications and retailer prices

From £167 GBP
$224 USD
As of November 1, 2026
Save £663 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £830 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.71ct lab-grown round diamond

This 1.71ct 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 LG799635486 or 799635486. Listed at 16 retailers as of November 1, 2026, with prices from £167 to £830, a £663 spread on the same certified stone. MOH London lists it at £830. 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

1.71
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799635486
Dimensions7.69 × 7.73 × 4.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.69 mm7.73 mm1.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799635486
Side View
Table 59.0%Crown 33.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.6%

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: Nov 1
Current: £830 GBP|Low: £167 GBP|High: £840 GBP|Avg: £476 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6£167 GBP
Retailer 8£207 GBP
Retailer 3£348 GBP
Retailer 9£352 GBP
Retailer 4£385 GBP
Retailer 10£402 GBP
Retailer 2£550 GBP
Retailer 5£619 GBP
Retailer 7£775 GBP
MOH London£830 GBP

42 data points across 10 retailers

16 retailers£167 GBP to £830 GBP

A
Cheapest Retailer
-
£167 GBP
$224 USD
A
Retailer 2
-
£194 GBP
$260 USD
View
Retailer 3
-
£207 GBP
$278 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
£207 GBP
$278 USD
View
A
Retailer 5
-
£348 GBP
€445 EUR
View
B+
Retailer 6
-
£352 GBP
$473 USD
View
A
Retailer 7
-
£385 GBP
View
A
Retailer 8
-
£396 GBP
$532 USD
View
A
Retailer 9
-
£402 GBP
$539 USD
View
B+
Retailer 10
-
£550 GBP
$738 USD
View
Retailer 11
-
£607 GBP
$815 USD
View
Price last confirmed 47 days ago
B+
Retailer 12
-
£619 GBP
$830 USD
View
B+
Retailer 13
-
£666 GBP
$894 USD
View
B
Retailer 14
-
£705 GBP
$946 USD
View
B
Retailer 15
-
£775 GBP
$1,040 USD
View
Most Expensive
B
MOH London
LG799635486 · Nov 1
£830 GBP
View
15 more retailers have this diamond
Prices start from £167 GBPSave up to £663 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
1.71ct Round
£167 GBP