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Round|Lab Grown|IGI

1.71ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG464198225

Shape and cutting style on the report: Round brilliant

Certificate IGI LG464198225

Diamond specifications and retailer prices

From £249 GBP
$334 USD
As of October 29, 2026
Save £1,967 GBP (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,217 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG464198225 or 464198225. Listed at 17 retailers as of October 29, 2026, with prices from £249 to £2,217, a £1,967 spread on the same certified stone. Do Amore Diamonds lists it at £2,217. 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG464198225
Dimensions7.65 × 7.70 × 4.75 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa.
Top View
7.65 mm7.70 mm1.71 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG464198225
Side View
Table 57.5%Crown 35.4°Girdle: MediumPavilion 41°Culet: NoneDepth 61.9%

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 29
Current: £2,217 GBP|Low: £249 GBP|High: £2,217 GBP|Avg: £767 GBP
Do Amore Diamonds
Retailer 2
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Retailer 17
October 30, 2026
Retailer 16£249 GBP
Retailer 14£290 GBP
Retailer 4£309 GBP
Retailer 13£309 GBP
Retailer 10£328 GBP
Retailer 12£366 GBP
Retailer 17£372 GBP
Retailer 15£563 GBP
Retailer 8£578 GBP
Retailer 2£579 GBP
Retailer 9£642 GBP
Retailer 5£907 GBP
Retailer 7£1,011 GBP
Retailer 3£1,097 GBP
Retailer 6£1,214 GBP
Retailer 11£1,340 GBP
Do Amore Diamonds£2,217 GBP

14 data points across 17 retailers

17 retailers£249 GBP to £2,217 GBP

A
Cheapest Retailer
-
£249 GBP
$334 USD
A
Retailer 2
-
£290 GBP
$388 USD
View
A
Retailer 3
-
£309 GBP
$414 USD
View
A
Retailer 4
-
£309 GBP
$414 USD
View
B+
Retailer 5
-
£328 GBP
$440 USD
View
A
Retailer 6
-
£366 GBP
$490 USD
View
A
Retailer 7
-
£372 GBP
$498 USD
View
A
Retailer 8
-
£563 GBP
$754 USD
View
A
Retailer 9
-
£578 GBP
$775 USD
View
A
Retailer 10
-
£579 GBP
View
A
Retailer 11
-
£642 GBP
$860 USD
View
A
Retailer 12
-
£907 GBP
$1,215 USD
View
A
Retailer 13
-
£1,011 GBP
$1,354 USD
View
A
Retailer 14
-
£1,097 GBP
$1,470 USD
View
B+
Retailer 15
-
£1,214 GBP
$1,626 USD
View
B+
Retailer 16
-
£1,340 GBP
View
Most Expensive
B
Do Amore Diamonds
27-C32A20587 · Oct 31
£2,217 GBP
$2,970 USD
View
16 more retailers have this diamond
Prices start from £249 GBPSave up to £1,967 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
£249 GBP