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Round|Lab Grown|IGI

1.70ct K SI2 Round Lab Grown Diamond

EX • K/SI2 • IGI LG499105197

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499105197

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: £4,996 GBP at MOH London · As of November 3, 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 LG499105197 or 499105197. 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 angle31.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499105197
Dimensions7.79 × 7.80 × 4.55 mm
L/W Ratio1.00
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
7.79 mm7.80 mm1.70 ctK / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499105197
Side View
Table 60.0%Crown 31.5°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 58.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,996 GBP|Low: £1,447 GBP|High: £5,062 GBP|Avg: £2,672 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 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£4,996 GBP

14 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
LG499105197 · Nov 3
£4,996 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