Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6502517721

Certificate GIA 6502517721

Diamond specifications and retailer prices

From £1,768 GBP
$2,369 USD
As of October 30, 2026
Save £2,882 GBP (62%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,650 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6502517721. Listed at 23 retailers as of October 30, 2026, with prices from £1,768 to £4,650, a £2,882 spread on the same certified stone. NZ Jewellers lists it at £4,650. 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

1.00
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6502517721
Dimensions6.37 × 6.32 × 3.93 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.37 mm6.32 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6502517721
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.2%

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: £4,650 GBP|Low: £1,705 GBP|High: £4,650 GBP|Avg: £2,755 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 6£1,758 GBP
Retailer 7£1,860 GBP
Retailer 9£2,093 GBP
Retailer 3£2,364 GBP
Retailer 4£2,455 GBP
Retailer 8£2,492 GBP
Retailer 2£2,734 GBP
Retailer 5£3,725 GBP
NZ Jewellers£4,650 GBP

43 data points across 9 retailers

23 retailers£1,768 GBP to £4,650 GBP

Retailer 1
-
£1,758 GBP
$2,355 USD
Price last confirmed 13 days ago
A
Retailer 2
-
£1,768 GBP
$2,369 USD
View
B+
Retailer 3
-
£1,805 GBP
$2,418 USD
View
B+
Retailer 4
-
£1,860 GBP
$2,492 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,868 GBP
A$3,851 AUD
View
B+
Retailer 6
-
£1,985 GBP
$2,660 USD
View
B+
Retailer 7
-
£2,015 GBP
$2,700 USD
View
B+
Retailer 8
-
£2,015 GBP
$2,700 USD
View
B+
Retailer 9
-
£2,042 GBP
$2,736 USD
View
B+
Retailer 10
-
£2,093 GBP
$2,804 USD
View
B
Retailer 11
-
£2,285 GBP
$3,062 USD
View
B
Retailer 12
-
£2,299 GBP
$3,080 USD
View
B
Retailer 13
-
£2,299 GBP
$3,080 USD
View
B
Retailer 14
-
£2,326 GBP
$3,116 USD
View
B
Retailer 15
-
£2,364 GBP
View
B
Retailer 16
-
£2,381 GBP
$3,190 USD
View
B+
Retailer 17
-
£2,455 GBP
€3,133 EUR
View
Retailer 18
-
£2,492 GBP
A$5,138 AUD
View
Price last confirmed 23 days ago
B+
Retailer 19
-
£2,519 GBP
$3,375 USD
View
Retailer 20
-
£2,582 GBP
$3,460 USD
View
Price last confirmed 8 days ago
B
Retailer 21
-
£2,734 GBP
ZAR 59,186 ZAR
View
B
Retailer 22
-
£3,725 GBP
View
Most Expensive
B
NZ Jewellers
954e9cce-4327-4cdb-a9ff-6c9d33a1f055 · Oct 30
£4,650 GBP
$6,231 USD
View
22 more retailers have this diamond
Prices start from £1,768 GBPSave up to £2,882 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
1.00ct Round
£1,768 GBP