Round|Natural|GIA

1.01ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6525606574

Shape and cutting style on the report: Round brilliant

Certificate GIA 6525606574

Diamond specifications and retailer prices

From £990 GBP
As of November 5, 2026
Save £2,368 GBP (71%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,358 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.01ct natural round diamond

This 1.01ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6525606574. Listed at 19 retailers as of November 5, 2026, with prices from £990 to £3,358, a £2,368 spread on the same certified stone. NZ Jewellers lists it at £3,358. 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

1.01
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6525606574
Dimensions6.42 × 6.38 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.42 mm6.38 mm1.01 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6525606574
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°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 5
Current: £1,317 GBP|Low: £990 GBP|High: £2,438 GBP|Avg: £1,496 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2£990 GBP
Retailer 8£999 GBP
Retailer 9£1,254 GBP
Retailer 1£1,317 GBP
Retailer 6£1,418 GBP
Retailer 4£1,486 GBP
Retailer 3£1,681 GBP
Retailer 7£1,681 GBP
Retailer 5£2,406 GBP

31 data points across 9 retailers

19 retailers£990 GBP to £3,358 GBP

A
Cheapest Retailer
-
£990 GBP
A
Retailer 2
-
£999 GBP
View
Retailer 3
-
£1,232 GBP
View
Price last confirmed 82 days ago
B+
Retailer 4
-
£1,254 GBP
View
B+
Retailer 5
-
£1,271 GBP
View
A
Retailer 6
-
£1,317 GBP
View
B+
Retailer 7
-
£1,377 GBP
View
Retailer 8
-
£1,393 GBP
View
Price last confirmed 10 days ago
B+
Retailer 9
-
£1,415 GBP
View
B+
Retailer 10
-
£1,418 GBP
View
B+
Retailer 11
-
£1,441 GBP
View
B+
Retailer 12
-
£1,486 GBP
View
B+
Retailer 13
-
£1,510 GBP
View
B+
Retailer 14
-
£1,589 GBP
View
B+
Retailer 15
-
£1,681 GBP
View
B+
Retailer 16
-
£1,681 GBP
View
B
Retailer 17
-
£2,332 GBP
View
B
Retailer 18
-
£2,406 GBP
View
Most Expensive
B
NZ Jewellers
73cdb1bf-78d2-49fe-85f4-f565697eeeda · Nov 5
£3,358 GBP
$4,520 USD
View
18 more retailers have this diamond
Prices start from £990 GBPSave up to £2,368 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
1.01ct Round
£990 GBP