CaratHunter
Plans
Oval|Lab Grown|IGI

1.71ct H SI1 Oval Lab Grown Diamond

ID • H/SI1 • IGI LG492136784

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG492136784

Diamond specifications and retailer prices

From £799 GBP
As of November 6, 2026
Save £3,230 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £4,030 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.71ct lab-grown oval diamond

This 1.71ct lab-grown oval sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492136784 or 492136784. Listed at 10 retailers as of November 1, 2026, with prices from £799 to £4,030, a £3,230 spread on the same certified stone. MOH London lists it at £4,030. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492136784
Dimensions9.72 × 6.66 × 4.18 mm
L/W Ratio1.46
Girdle conditionFaceted
Culet sizePointed
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
9.72 mm6.66 mm1.71 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492136784
Side View
Table 56.0%Crown 33.5°Girdle: MED-THKPavilion 41.7°Culet: NoneDepth 62.8%

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 6
Current: £4,030 GBP|Low: £799 GBP|High: £4,084 GBP|Avg: £1,945 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 4£799 GBP
Retailer 3£1,216 GBP
Retailer 9£1,369 GBP
Retailer 5£1,411 GBP
Retailer 7£1,539 GBP
Retailer 8£1,897 GBP
Retailer 6£2,217 GBP
Retailer 2£2,433 GBP
MOH London£4,030 GBP

14 data points across 9 retailers

10 retailers£799 GBP to £4,030 GBP

A
Cheapest Retailer
-
£799 GBP
B+
Retailer 2
-
£1,216 GBP
View
B+
Retailer 3
-
£1,323 GBP
View
B+
Retailer 4
-
£1,411 GBP
View
Retailer 5
-
£1,411 GBP
View
Price last confirmed 25 days ago
B
Retailer 6
-
£1,539 GBP
View
B
Retailer 7
-
£2,217 GBP
View
B
Retailer 8
-
£2,433 GBP
View
B
Retailer 9
-
£2,645 GBP
View
Most Expensive
B
MOH London
LG492136784 · Nov 1
£4,030 GBP
View
9 more retailers have this diamond
Prices start from £799 GBPSave up to £3,230 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 Oval
£799 GBP