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Round|Natural|IGI

1.25ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 670479480

Shape and cutting style on the report: Round brilliant

Certificate IGI 670479480

Diamond specifications and retailer prices

From £1,676 GBP
$2,245 USD
As of October 30, 2026
Save £2,202 GBP (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,877 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670479480. Listed at 11 retailers as of October 30, 2026, with prices from £1,676 to £3,877, a £2,202 spread on the same certified stone. NZ Jewellers lists it at £3,877. 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

1.25
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 670479480
Dimensions6.90 × 6.95 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.90 mm6.95 mm1.25 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670479480
Side View
Table 61.0%Crown 32°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 60.6%

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: Oct 30
Current: £2,174 GBP|Low: £1,155 GBP|High: £3,209 GBP|Avg: £1,936 GBP|+4.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2£1,155 GBP
Retailer 10£1,676 GBP
Retailer 5£1,712 GBP
Retailer 3£1,723 GBP
Retailer 7£1,764 GBP
Retailer 6£1,855 GBP
Retailer 9£1,959 GBP
Retailer 1£2,174 GBP
Retailer 8£2,207 GBP
Retailer 4£3,176 GBP

33 data points across 10 retailers

11 retailers£1,676 GBP to £3,877 GBP

A
Cheapest Retailer
-
£1,676 GBP
$2,245 USD
A
Retailer 2
-
£1,712 GBP
$2,294 USD
View
Final sale: no returns
A
Retailer 3
-
£1,723 GBP
View
A
Retailer 4
-
£1,855 GBP
$2,485 USD
View
A
Retailer 5
-
£1,855 GBP
$2,485 USD
View
A
Retailer 6
-
£1,940 GBP
$2,600 USD
View
A
Retailer 7
-
£1,959 GBP
$2,625 USD
View
A
Retailer 8
-
£2,140 GBP
$2,867 USD
View
A
Retailer 9
-
£2,174 GBP
€2,774 EUR
View
B+
Retailer 10
-
£3,176 GBP
View
Most Expensive
B
NZ Jewellers
847bf1c9-4f0d-461b-afc1-baf01741f4bf · Oct 30
£3,877 GBP
$5,195 USD
View
10 more retailers have this diamond
Prices start from £1,676 GBPSave up to £2,202 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
1.25ct Round
£1,676 GBP