CaratHunter
Plans
Radiant|Lab Grown|IGI

1.71ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG519238354

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG519238354

Diamond specifications and retailer prices

From £409 GBP
$544 USD
As of October 23, 2026
Save £1,710 GBP (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,118 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG519238354 or 519238354. Listed at 12 retailers as of October 23, 2026, with prices from £409 to £2,118, a £1,710 spread on the same certified stone. MOH London lists it at £2,118. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.71
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle30°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519238354
Dimensions7.69 × 5.92 × 4.07 mm
L/W Ratio1.30
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.69 mm5.92 mm1.71 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG519238354
Side View
Table 68.5%Crown 42.6°Girdle: MediumPavilion 30°Culet: NoneDepth 68.8%

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: Oct 23
Current: £2,118 GBP|Low: £327 GBP|High: £2,141 GBP|Avg: £938 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 10£458 GBP
Retailer 7£507 GBP
Retailer 11£509 GBP
Retailer 6£608 GBP
Retailer 4£736 GBP
Retailer 9£782 GBP
Retailer 2£787 GBP
Retailer 5£1,308 GBP
Retailer 8£1,333 GBP
Retailer 3£1,358 GBP
MOH London£2,118 GBP

41 data points across 11 retailers

12 retailers£409 GBP to £2,118 GBP

A
Cheapest Retailer
-
£409 GBP
$544 USD
B+
Retailer 2
-
£458 GBP
$610 USD
View
B+
Retailer 3
-
£458 GBP
$610 USD
View
Final sale: no returns
B+
Retailer 4
-
£507 GBP
$675 USD
View
B+
Retailer 5
-
£509 GBP
$678 USD
View
B+
Retailer 6
-
£608 GBP
$810 USD
View
B
Retailer 7
-
£736 GBP
€933 EUR
View
B
Retailer 8
-
£782 GBP
$1,042 USD
View
B
Retailer 9
-
£787 GBP
View
B
Retailer 10
-
£1,308 GBP
$1,742 USD
View
B
Retailer 11
-
£1,333 GBP
$1,775 USD
View
Most Expensive
B
MOH London
LG519238354 · Oct 26
£2,118 GBP
View
11 more retailers have this diamond
Prices start from £409 GBPSave up to £1,710 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 Radiant
£409 GBP