CaratHunter
Plans
Round|Lab Grown|IGI

1.70ct K SI2 Round Lab Grown Diamond

EX • K/SI2 • IGI LG451055652

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055652

Diamond specifications and retailer prices

From £1,508 GBP
As of November 5, 2026
Save £1,297 GBP (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,982 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.7ct lab-grown round diamond

This 1.7ct 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 LG451055652 or 451055652. Listed at 8 retailers as of November 5, 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

1.70
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055652
Dimensions7.63 × 7.66 × 4.69 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.63 mm7.66 mm1.70 ctK / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055652
Side View
Table 60.0%Crown 35.9°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.3%

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: £4,982 GBP|Low: £1,447 GBP|High: £5,062 GBP|Avg: £2,671 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£1,508 GBP
Retailer 6£1,641 GBP
Retailer 4£1,749 GBP
Retailer 8£2,228 GBP
Retailer 7£2,404 GBP
Retailer 5£2,737 GBP
Retailer 2£2,806 GBP
Retailer 9£3,914 GBP
MOH London£4,982 GBP

15 data points across 9 retailers

8 retailers£1,508 GBP to £2,806 GBP

B+
Cheapest Retailer
-
£1,508 GBP
B
Retailer 2
-
£1,641 GBP
View
Retailer 3
-
£1,749 GBP
View
Price last confirmed 26 days ago
B
Retailer 4
-
£1,749 GBP
View
B
Retailer 5
-
£2,404 GBP
View
B
Retailer 6
-
£2,737 GBP
View
B
Retailer 7
-
£2,806 GBP
View
Most Expensive
MOH London
LG451055652 · Nov 5
£4,982 GBP
View
Price under review
7 more retailers have this diamond
Prices start from £1,508 GBPSave up to £1,297 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+
1.70ct Round
£1,508 GBP