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Round|Natural|IGI

1.30ct M SI1 Round Natural Diamond

EX • M/SI1 • IGI 648418616

Shape and cutting style on the report: Round brilliant

Certificate IGI 648418616

Diamond specifications and retailer prices

From £922 GBP
As of November 5, 2026
Save £2,207 GBP (71%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,129 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 648418616. Listed at 13 retailers as of November 5, 2026, with prices from £922 to £3,129, a £2,207 spread on the same certified stone. NZ Jewellers lists it at £3,129. 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

1.30
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 648418616
Dimensions6.90 × 6.95 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.90 mm6.95 mm1.30 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 648418616
Side View
Table 58.0%Crown 35.7°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.0%

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: £1,261 GBP|Low: £922 GBP|High: £1,570 GBP|Avg: £1,312 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3£922 GBP
Retailer 1£1,261 GBP
Retailer 5£1,264 GBP
Retailer 6£1,334 GBP
Retailer 2£1,563 GBP
Retailer 4£1,565 GBP

38 data points across 6 retailers

13 retailers£922 GBP to £3,129 GBP

A
Cheapest Retailer
-
£922 GBP
B+
Retailer 2
-
£1,168 GBP
View
A
Retailer 3
-
£1,261 GBP
View
A
Retailer 4
-
£1,264 GBP
View
Retailer 5
-
£1,282 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£1,282 GBP
View
B+
Retailer 7
-
£1,334 GBP
View
B+
Retailer 8
-
£1,342 GBP
View
B+
Retailer 9
-
£1,384 GBP
View
B+
Retailer 10
-
£1,480 GBP
View
B+
Retailer 11
-
£1,563 GBP
View
B+
Retailer 12
-
£1,565 GBP
View
Most Expensive
C
NZ Jewellers
e915a130-4a84-4954-aff5-80016a0959e4 · Nov 5
£3,129 GBP
$4,211 USD
View
12 more retailers have this diamond
Prices start from £922 GBPSave up to £2,207 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
1.30ct Round
£922 GBP