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Radiant|Natural|HRD

1.73ct D SI2 Radiant Natural Diamond

ID • D/SI2 • HRD 250000280591

Certificate HRD 250000280591

Diamond specifications and retailer prices

From £5,144 GBP
SGD 9,314 SGD
As of October 31, 2026
Save £3,026 GBP (37%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £9,753 GBP at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.73ct natural radiant diamond

This 1.73ct natural radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by HRD 250000280591. Listed at 9 retailers as of October 29, 2026, with a 59% 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

1.73
Carat
D
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle33°
OriginNatural
Grading LabHRD
CertificateHRD 250000280591
Dimensions7.99 × 5.88 × 3.96 mm
L/W Ratio1.36
Girdle conditionPolished
Top View
7.99 mm5.88 mm1.73 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 250000280591
Side View
Table 67.0%CrownGirdle: MediumPavilion 33°Culet: NoneDepth 67.3%

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: £9,753 GBP|Low: £4,308 GBP|High: £9,753 GBP|Avg: £6,027 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
October 31, 2026
Retailer 4£4,308 GBP
Retailer 12£4,914 GBP
Retailer 6£5,144 GBP
Retailer 11£5,248 GBP
Retailer 9£5,320 GBP
Retailer 10£5,359 GBP
Retailer 7£5,383 GBP
Retailer 8£5,952 GBP
Retailer 2£6,076 GBP
Retailer 3£7,133 GBP
Retailer 5£8,170 GBP
NZ Jewellers£9,753 GBP

22 data points across 12 retailers

9 retailers£5,144 GBP to £8,170 GBP

A
Cheapest Retailer
-
£5,144 GBP
SGD 9,314 SGD
A
Retailer 2
-
£5,248 GBP
A$10,818 AUD
View
A
Retailer 3
-
£5,320 GBP
$7,128 USD
View
A
Retailer 4
-
£5,359 GBP
$7,180 USD
View
A
Retailer 5
-
£5,383 GBP
$7,212 USD
View
Final sale: no returns
Retailer 6
-
£5,952 GBP
$7,975 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
£6,076 GBP
€7,754 EUR
View
B+
Retailer 8
-
£8,170 GBP
View
Most Expensive
NZ Jewellers
63b80af5-784a-4001-a814-d39994758036 · Oct 24
£9,753 GBP
$13,068 USD
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from £5,144 GBPSave up to £3,026 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
1.73ct Radiant
£5,144 GBP