Round|Natural|GIA

1.60ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2507839323

Certificate GIA 2507839323

Diamond specifications and retailer prices

From £4,626 GBP
$6,199 USD
As of October 30, 2026
Save £3,534 GBP (43%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £9,794 GBP at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.6ct natural round diamond

This 1.6ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2507839323. Listed at 18 retailers as of October 30, 2026, with a 76% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.60
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2507839323
Dimensions7.46 × 7.41 × 4.60 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.46 mm7.41 mm1.60 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2507839323
Side View
Table 59.0%Crown 36°Girdle: ThickPavilion 40.6°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £9,794 GBP|Low: £4,081 GBP|High: £9,794 GBP|Avg: £6,239 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 3£4,571 GBP
Retailer 4£4,897 GBP
Retailer 5£4,911 GBP
Retailer 6£5,305 GBP
Retailer 9£5,483 GBP
Retailer 14£5,646 GBP
Retailer 11£5,874 GBP
Retailer 12£5,874 GBP
Retailer 7£6,023 GBP
Retailer 13£6,068 GBP
Retailer 2£6,370 GBP
Retailer 10£7,195 GBP
Retailer 8£8,161 GBP
NZ Jewellers£9,794 GBP

38 data points across 14 retailers

18 retailers£4,626 GBP to £8,161 GBP

Retailer 1
-
£4,571 GBP
$6,125 USD
Price last confirmed 14 days ago
B+
Retailer 2
-
£4,626 GBP
$6,199 USD
View
Retailer 3
-
£4,897 GBP
$6,561 USD
View
Price last confirmed 16 days ago
B+
Retailer 4
-
£4,911 GBP
$6,580 USD
View
Retailer 5
-
£5,305 GBP
$7,108 USD
View
Price last confirmed 12 days ago
Retailer 6
-
£5,387 GBP
$7,218 USD
View
Price last confirmed 17 days ago
B+
Retailer 7
-
£5,483 GBP
View
Retailer 8
-
£5,646 GBP
A$11,638 AUD
View
Price last confirmed 10 days ago
B
Retailer 9
-
£5,874 GBP
$7,870 USD
View
B
Retailer 10
-
£5,874 GBP
$7,870 USD
View
B+
Retailer 11
-
£6,023 GBP
View
B+
Retailer 12
-
£6,068 GBP
$8,130 USD
View
Retailer 13
-
£6,121 GBP
$8,202 USD
View
Price last confirmed 11 days ago
B
Retailer 14
-
£6,370 GBP
€8,129 EUR
View
Retailer 15
-
£6,451 GBP
$8,644 USD
View
Price last confirmed 17 days ago
B
Retailer 16
-
£7,195 GBP
ZAR 155,738 ZAR
View
B
Retailer 17
-
£8,161 GBP
View
Most Expensive
NZ Jewellers
718acebf-4c80-42b3-a339-20d5808f87ce · Oct 20
£9,794 GBP
$13,123 USD
View
Price last confirmed 12 days ago
17 more retailers have this diamond
Prices start from £4,626 GBPSave up to £3,534 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+
1.60ct Round
£4,626 GBP