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Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1543161928

Certificate GIA 1543161928

Diamond specifications and retailer prices

From £2,321 GBP
HK$24,300 HKD
As of October 31, 2026
Save £3,149 GBP (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,471 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1543161928. Listed at 19 retailers as of October 30, 2026, with prices from £2,321 to £5,471, a £3,149 spread on the same certified stone. NZ Jewellers lists it at £5,471. 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1543161928
Dimensions6.76 × 6.72 × 4.23 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle, Cavity, Natural
Top View
6.76 mm6.72 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1543161928
Side View
Table 57.0%Crown 36.5°Girdle: THN-SLIPavilion 41°Culet: NoneDepth 62.7%

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 31
Current: £5,471 GBP|Low: £2,302 GBP|High: £7,282 GBP|Avg: £3,986 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
October 31, 2026
Retailer 7£2,321 GBP
Retailer 12£2,763 GBP
Retailer 14£2,898 GBP
Retailer 3£2,970 GBP
Retailer 13£2,985 GBP
Retailer 4£3,026 GBP
Retailer 9£3,030 GBP
Retailer 6£3,140 GBP
Retailer 8£3,192 GBP
Retailer 10£3,500 GBP
Retailer 2£3,860 GBP
Retailer 11£5,259 GBP
NZ Jewellers£5,471 GBP
Retailer 5£7,282 GBP

40 data points across 14 retailers

19 retailers£2,321 GBP to £5,471 GBP

A
Cheapest Retailer
-
£2,321 GBP
HK$24,300 HKD
A
Retailer 2
-
£2,541 GBP
$3,405 USD
View
A
Retailer 3
-
£2,712 GBP
A$5,591 AUD
View
A
Retailer 4
-
£2,763 GBP
$3,702 USD
View
B+
Retailer 5
-
£2,898 GBP
$3,883 USD
View
Final sale: no returns
B+
Retailer 6
-
£2,928 GBP
SGD 5,302 SGD
View
B+
Retailer 7
-
£2,970 GBP
$3,980 USD
View
B+
Retailer 8
-
£2,985 GBP
$4,000 USD
View
B+
Retailer 9
-
£3,026 GBP
A$6,238 AUD
View
B+
Retailer 10
-
£3,030 GBP
View
B+
Retailer 11
-
£3,140 GBP
$4,207 USD
View
B+
Retailer 12
-
£3,140 GBP
$4,207 USD
View
B+
Retailer 13
-
£3,192 GBP
View
B+
Retailer 14
-
£3,251 GBP
$4,355 USD
View
B+
Retailer 15
-
£3,500 GBP
€4,466 EUR
View
B+
Retailer 16
-
£3,623 GBP
$4,855 USD
View
B+
Retailer 17
-
£3,860 GBP
ZAR 83,548 ZAR
View
B
Retailer 18
-
£5,259 GBP
View
Most Expensive
B
NZ Jewellers
2cfba05b-86f4-4373-9dfc-8950396eabee · Oct 30
£5,471 GBP
$7,330 USD
View
18 more retailers have this diamond
Prices start from £2,321 GBPSave up to £3,149 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
1.20ct Round
£2,321 GBP