CaratHunter
Plans
Round|Lab Grown|IGI

1.71ct K SI2 Round Lab Grown Diamond

EX • K/SI2 • IGI LG440011209

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440011209

Diamond specifications and retailer prices

From £1,516 GBP
As of November 5, 2026
Save £1,305 GBP (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,011 GBP at MOH London · As of November 5, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440011209 or 440011209. Listed at 8 retailers as of November 4, 2026, with a 86% 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

1.71
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440011209
Dimensions7.58 × 7.62 × 4.75 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.58 mm7.62 mm1.71 ctK / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440011209
Side View
Table 55.5%Crown 36.3°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £5,011 GBP|Low: £1,456 GBP|High: £5,093 GBP|Avg: £2,686 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3£1,516 GBP
Retailer 6£1,650 GBP
Retailer 4£1,759 GBP
Retailer 8£2,240 GBP
Retailer 7£2,418 GBP
Retailer 5£2,752 GBP
Retailer 2£2,822 GBP
Retailer 9£3,937 GBP
MOH London£5,011 GBP

15 data points across 9 retailers

8 retailers£1,516 GBP to £2,822 GBP

B+
Cheapest Retailer
-
£1,516 GBP
B
Retailer 2
-
£1,650 GBP
View
B
Retailer 3
-
£1,759 GBP
View
Retailer 4
-
£1,759 GBP
View
Price last confirmed 26 days ago
B
Retailer 5
-
£2,418 GBP
View
B
Retailer 6
-
£2,752 GBP
View
B
Retailer 7
-
£2,822 GBP
View
Most Expensive
MOH London
LG440011209 · Nov 5
£5,011 GBP
View
Price under review
7 more retailers have this diamond
Prices start from £1,516 GBPSave up to £1,305 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+
1.71ct Round
£1,516 GBP