CaratHunter
Plans
Round|Natural|IGI

1.68ct M SI1 Round Natural Diamond

EX • M/SI1 • IGI 587305957

Shape and cutting style on the report: Round brilliant

Certificate IGI 587305957

Diamond specifications and retailer prices

From £1,883 GBP
As of November 5, 2026
Save £2,089 GBP (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,972 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.68ct natural round diamond

This 1.68ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 587305957. Listed at 9 retailers as of November 5, 2026, with prices from £1,883 to £3,972, a £2,089 spread on the same certified stone. NZ Jewellers lists it at £3,972. 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

1.68
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 587305957
Dimensions7.57 × 7.63 × 4.70 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.57 mm7.63 mm1.68 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 587305957
Side View
Table 58.0%Crown 35.2°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

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 5
Current: £3,972 GBP|Low: £1,690 GBP|High: £3,972 GBP|Avg: £2,212 GBP|+1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11£1,690 GBP
Retailer 3£1,744 GBP
Retailer 8£1,883 GBP
Retailer 7£1,900 GBP
Retailer 10£1,900 GBP
Retailer 9£1,987 GBP
Retailer 2£2,068 GBP
Retailer 6£2,192 GBP
Retailer 4£2,318 GBP
Retailer 5£2,357 GBP
NZ Jewellers£3,972 GBP

39 data points across 11 retailers

9 retailers£1,883 GBP to £3,972 GBP

A
Cheapest Retailer
-
£1,883 GBP
A
Retailer 2
-
£1,900 GBP
View
Retailer 3
-
£1,900 GBP
View
Price last confirmed 9 days ago
B+
Retailer 4
-
£1,987 GBP
View
A
Retailer 5
-
£2,068 GBP
View
B+
Retailer 6
-
£2,192 GBP
View
B+
Retailer 7
-
£2,318 GBP
View
B+
Retailer 8
-
£2,357 GBP
View
Most Expensive
B
NZ Jewellers
30d04372-2935-4b9d-9ee4-2c92503d828d · Nov 5
£3,972 GBP
$5,316 USD
View
8 more retailers have this diamond
Prices start from £1,883 GBPSave up to £2,089 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
1.68ct Round
£1,883 GBP