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Round|Lab Grown|IGI

1.71ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG440012001

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440012001

Diamond specifications and retailer prices

From £709 GBP
$950 USD
As of October 30, 2026
Save £2,747 GBP (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,456 GBP at MOH London · As of October 27, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440012001 or 440012001. Listed at 10 retailers as of October 27, 2026, with prices from £709 to £3,456, a £2,747 spread on the same certified stone. MOH London lists it at £3,456. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440012001
Dimensions7.81 × 7.78 × 4.61 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.81 mm7.78 mm1.71 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440012001
Side View
Table 59.0%Crown 32.3°Girdle: ThickPavilion 40.3°Culet: NoneDepth 59.1%

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: Oct 30
Current: £3,456 GBP|Low: £709 GBP|High: £3,497 GBP|Avg: £1,891 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2£709 GBP
Retailer 4£1,166 GBP
Retailer 7£1,352 GBP
Retailer 6£1,655 GBP
Retailer 3£1,908 GBP
Retailer 5£2,193 GBP
Retailer 8£2,705 GBP
MOH London£3,456 GBP

12 data points across 8 retailers

10 retailers£709 GBP to £3,456 GBP

A
Cheapest Retailer
-
£709 GBP
$950 USD
B+
Retailer 2
-
£1,042 GBP
$1,396 USD
View
B+
Retailer 3
-
£1,133 GBP
$1,518 USD
View
B+
Retailer 4
-
£1,166 GBP
$1,562 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,208 GBP
$1,619 USD
View
Retailer 6
-
£1,208 GBP
$1,619 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
£1,908 GBP
$2,557 USD
View
B
Retailer 8
-
£2,193 GBP
$2,938 USD
View
B
Retailer 9
-
£2,265 GBP
$3,035 USD
View
Most Expensive
B
MOH London
LG440012001 · Oct 27
£3,456 GBP
View
9 more retailers have this diamond
Prices start from £709 GBPSave up to £2,747 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
£709 GBP