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Round|Natural|GIA

1.00ct M I1 Round Natural Diamond

EX • M/I1 • GIA 6451834508

Certificate GIA 6451834508

Diamond specifications and retailer prices

From £1,344 GBP
As of November 5, 2026
Save £670 GBP (33%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,618 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded M colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 6451834508. Listed at 6 retailers as of November 5, 2026, with a 50% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
M
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6451834508
Dimensions6.33 × 6.40 × 3.98 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.33 mm6.40 mm1.00 ctM / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6451834508
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,618 GBP|Low: £1,124 GBP|High: £3,618 GBP|Avg: £1,721 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 3£1,124 GBP
Retailer 11£1,225 GBP
Retailer 8£1,327 GBP
Retailer 5£1,344 GBP
Retailer 7£1,344 GBP
Retailer 4£1,406 GBP
Retailer 6£1,551 GBP
Retailer 9£1,765 GBP
Retailer 2£2,014 GBP
Retailer 10£2,171 GBP
NZ Jewellers£3,618 GBP

20 data points across 11 retailers

6 retailers£1,344 GBP to £2,014 GBP

Retailer 1
-
£1,344 GBP
Price last confirmed 8 days ago
B
Retailer 2
-
£1,344 GBP
View
B
Retailer 3
-
£1,406 GBP
View
B
Retailer 4
-
£1,551 GBP
View
B
Retailer 5
-
£2,014 GBP
View
Most Expensive
NZ Jewellers
5682ad06-26e2-4955-bc60-3ebbfdacf42e · Nov 5
£3,618 GBP
$4,870 USD
View
Price under review
5 more retailers have this diamond
Prices start from £1,344 GBPSave up to £670 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
1.00ct Round
£1,344 GBP