CaratHunter
Plans
Round|Lab Grown|IGI

1.71ct D I1 Round Lab Grown Diamond

EX • D/I1 • IGI LG490175465

Shape and cutting style on the report: Round brilliant

Certificate IGI LG490175465

Diamond specifications and retailer prices

From £230 GBP
$308 USD
As of October 30, 2026
Save £912 GBP (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,142 GBP at B2C Jewels · As of October 26, 2026
View at B2C Jewels

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 D colour (colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI LG490175465 or 490175465. Listed at 9 retailers as of October 26, 2026, with prices from £230 to £1,142, a £912 spread on the same certified stone. B2C Jewels lists it at £1,142. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
D
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490175465
Dimensions7.54 × 7.58 × 4.74 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.54 mm7.58 mm1.71 ctD / I1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490175465
Side View
Table 56.5%Crown 36.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.6%

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: £1,142 GBP|Low: £118 GBP|High: £1,142 GBP|Avg: £489 GBP|+140.9%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 7£118 GBP
Retailer 6£217 GBP
Retailer 5£230 GBP
Retailer 2£288 GBP
Retailer 8£455 GBP
Retailer 4£575 GBP
Retailer 3£795 GBP
B2C Jewels£1,142 GBP

16 data points across 8 retailers

9 retailers£230 GBP to £1,142 GBP

Retailer 1
-
£175 GBP
$235 USD
Price last confirmed 38 days ago
Retailer 2
-
£203 GBP
$272 USD
View
Price last confirmed 38 days ago
Retailer 3
-
£214 GBP
$287 USD
View
Price last confirmed 35 days ago
B+
Retailer 4
-
£230 GBP
$308 USD
View
A
Retailer 5
-
£288 GBP
€367 EUR
View
B
Retailer 6
-
£575 GBP
$770 USD
View
Retailer 7
-
£698 GBP
$935 USD
View
Price last confirmed 39 days ago
B
Retailer 8
-
£795 GBP
View
Most Expensive
B
B2C Jewels
20884851 · Oct 26
£1,142 GBP
$1,530 USD
View
8 more retailers have this diamond
Prices start from £230 GBPSave up to £912 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
£230 GBP