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1.71ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG445036677

Shape and cutting style on the report: Round brilliant

Certificate IGI LG445036677

Diamond specifications and retailer prices

From £709 GBP
$950 USD
As of October 30, 2026
Save £2,760 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,469 GBP at MOH London · As of October 29, 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 LG445036677 or 445036677. Listed at 10 retailers as of October 29, 2026, with prices from £709 to £3,469, a £2,760 spread on the same certified stone. MOH London lists it at £3,469. 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 angle32.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG445036677
Dimensions7.66 × 7.72 × 4.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.66 mm7.72 mm1.71 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG445036677
Side View
Table 59.5%Crown 32.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.5%

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: £3,469 GBP|Low: £709 GBP|High: £3,497 GBP|Avg: £1,657 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2£709 GBP
Retailer 11£779 GBP
Retailer 4£1,042 GBP
Retailer 7£1,167 GBP
Retailer 5£1,208 GBP
Retailer 8£1,208 GBP
Retailer 10£1,655 GBP
Retailer 6£1,908 GBP
Retailer 9£2,193 GBP
Retailer 3£2,705 GBP
MOH London£3,469 GBP

14 data points across 11 retailers

10 retailers£709 GBP to £3,469 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
-
£1,167 GBP
$1,563 USD
View
Final sale: no returns
Retailer 5
-
£1,208 GBP
$1,619 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£1,208 GBP
$1,619 USD
View
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
LG445036677 · Oct 29
£3,469 GBP
View
9 more retailers have this diamond
Prices start from £709 GBPSave up to £2,760 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