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Round|Natural|GIA

1.60ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1528839139

Certificate GIA 1528839139

Diamond specifications and retailer prices

From £4,015 GBP
$5,380 USD
As of November 1, 2026
Save £4,979 GBP (55%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £8,994 GBP at NZ Jewellers · As of October 30, 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 1528839139. Listed at 25 retailers as of October 30, 2026, with prices from £4,015 to £8,994, a £4,979 spread on the same certified stone. NZ Jewellers lists it at £8,994. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1528839139
Dimensions7.40 × 7.46 × 4.67 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
7.40 mm7.46 mm1.60 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528839139
Side View
Table 56.0%Crown 35.5°Girdle: Medium to Slightly ThickPavilion 40.8°Culet: NoneDepth 62.9%

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 1
Current: £8,994 GBP|Low: £4,015 GBP|High: £8,994 GBP|Avg: £5,234 GBP
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 17
Retailer 18
Retailer 19
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Retailer 21
Retailer 22
Retailer 23
Retailer 24
Retailer 25
November 1, 2026
Retailer 3£4,015 GBP
Retailer 6£4,084 GBP
Retailer 7£4,130 GBP
Retailer 12£4,249 GBP
Retailer 23£4,253 GBP
Retailer 8£4,306 GBP
Retailer 14£4,497 GBP
Retailer 4£4,497 GBP
Retailer 25£4,526 GBP
Retailer 18£4,661 GBP
Retailer 15£4,771 GBP
Retailer 9£4,797 GBP
Retailer 10£4,872 GBP
Retailer 5£4,947 GBP
Retailer 16£4,948 GBP
Retailer 22£4,962 GBP
Retailer 19£5,123 GBP
Retailer 24£5,220 GBP
Retailer 17£5,321 GBP
Retailer 2£5,531 GBP
Retailer 11£5,621 GBP
Retailer 21£5,754 GBP
Retailer 20£6,607 GBP
Retailer 13£7,495 GBP
NZ Jewellers£8,994 GBP

31 data points across 25 retailers

25 retailers£4,015 GBP to £8,994 GBP

A
Cheapest Retailer
-
£4,015 GBP
$5,380 USD
A
Retailer 2
-
£4,084 GBP
$5,472 USD
View
A
Retailer 3
-
£4,130 GBP
$5,534 USD
View
A
Retailer 4
-
£4,249 GBP
$5,693 USD
View
A
Retailer 5
-
£4,253 GBP
$5,699 USD
View
B+
Retailer 6
-
£4,306 GBP
$5,770 USD
View
B+
Retailer 7
-
£4,497 GBP
$6,025 USD
View
Final sale: no returns
B+
Retailer 8
-
£4,497 GBP
$6,026 USD
View
A
Retailer 9
-
£4,526 GBP
$6,065 USD
View
B+
Retailer 10
-
£4,661 GBP
CA$8,673 CAD
View
B+
Retailer 11
-
£4,771 GBP
$6,392 USD
View
B+
Retailer 12
-
£4,797 GBP
$6,427 USD
View
B+
Retailer 13
-
£4,872 GBP
$6,528 USD
View
B+
Retailer 14
-
£4,947 GBP
$6,628 USD
View
Retailer 15
-
£4,948 GBP
$6,630 USD
View
Price last confirmed 17 days ago
B+
Retailer 16
-
£4,962 GBP
$6,648 USD
View
B+
Retailer 17
-
£5,123 GBP
View
Retailer 18
-
£5,220 GBP
A$10,759 AUD
View
Price last confirmed 10 days ago
B+
Retailer 19
-
£5,321 GBP
$7,129 USD
View
B+
Retailer 20
-
£5,531 GBP
View
B
Retailer 21
-
£5,621 GBP
$7,532 USD
View
B
Retailer 22
-
£5,754 GBP
€7,343 EUR
View
B
Retailer 23
-
£6,607 GBP
ZAR 143,021 ZAR
View
B
Retailer 24
-
£7,495 GBP
View
Most Expensive
B
NZ Jewellers
2943a18f-7cc3-4352-af1e-c57bdbc3520e · Oct 30
£8,994 GBP
$12,051 USD
View
24 more retailers have this diamond
Prices start from £4,015 GBPSave up to £4,979 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
1.60ct Round
£4,015 GBP