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Round|Natural|IGI

1.60ct L SI1 Round Natural Diamond

EX • L/SI1 • IGI 623455489

Shape and cutting style on the report: Round brilliant

Certificate IGI 623455489

Diamond specifications and retailer prices

From £1,433 GBP
As of November 4, 2026
Save £1,884 GBP (57%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,317 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.6ct natural round diamond

This 1.6ct natural round sits in the one-and-a-half to two carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 623455489. Listed at 10 retailers as of November 4, 2026, with prices from £1,433 to £3,317, a £1,884 spread on the same certified stone. NZ Jewellers lists it at £3,317. 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

1.60
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 623455489
Dimensions7.43 × 7.47 × 4.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.43 mm7.47 mm1.60 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 623455489
Side View
Table 58.0%Crown 35.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.4%

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: Nov 4
Current: £3,317 GBP|Low: £1,433 GBP|High: £3,442 GBP|Avg: £1,936 GBP|-3.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 8£1,433 GBP
Retailer 11£1,587 GBP
Retailer 12£1,587 GBP
Retailer 4£1,599 GBP
Retailer 7£1,601 GBP
Retailer 10£1,660 GBP
Retailer 13£1,690 GBP
Retailer 9£1,758 GBP
Retailer 3£1,831 GBP
Retailer 2£1,936 GBP
Retailer 6£2,154 GBP
Retailer 5£2,697 GBP
NZ Jewellers£3,317 GBP

29 data points across 13 retailers

10 retailers£1,433 GBP to £3,317 GBP

A
Cheapest Retailer
-
£1,433 GBP
Retailer 2
-
£1,587 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£1,587 GBP
View
A
Retailer 4
-
£1,601 GBP
View
B+
Retailer 5
-
£1,660 GBP
View
B+
Retailer 6
-
£1,690 GBP
View
B+
Retailer 7
-
£1,831 GBP
View
A
Retailer 8
-
£1,936 GBP
View
B+
Retailer 9
-
£2,154 GBP
View
Most Expensive
B
NZ Jewellers
4d7dcd95-ef8d-4172-939a-e61552f28d4d · Nov 5
£3,317 GBP
$4,465 USD
View
9 more retailers have this diamond
Prices start from £1,433 GBPSave up to £1,884 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
1.60ct Round
£1,433 GBP