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Radiant|Natural|GIA

1.51ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1525780219

Certificate GIA 1525780219

Diamond specifications and retailer prices

From HK$30,694 HKD
$3,912 USD
As of November 2, 2026
Save HK$37,826 HKD (55%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: HK$68,520 HKD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant 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 stated by the retailer rather than the lab and certified by GIA 1525780219. Listed at 29 retailers as of October 30, 2026, with prices from HK$30,694 to HK$68,520, a HK$37,826 spread on the same certified stone. NZ Jewellers lists it at HK$68,520. 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

1.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.97°
Pavilion angle31.5°
OriginNatural
Grading LabGIA
CertificateGIA 1525780219
Dimensions7.21 × 5.69 × 3.91 mm
L/W Ratio1.27
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.21 mm5.69 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1525780219
Side View
Table 66.0%Crown 44.97°Girdle: THK-VTHPavilion 31.5°Culet: NoneDepth 68.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$68,520 HKD|Low: HK$26,536 HKD|High: HK$68,520 HKD|Avg: HK$40,041 HKD
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
Retailer 25
Retailer 26
November 2, 2026
Retailer 11HK$30,694 HKD
Retailer 8HK$30,725 HKD
Retailer 22HK$31,052 HKD
Retailer 7HK$31,071 HKD
Retailer 12HK$31,438 HKD
Retailer 10HK$32,891 HKD
Retailer 24HK$33,699 HKD
Retailer 9HK$35,398 HKD
Retailer 16HK$35,527 HKD
Retailer 6HK$35,629 HKD
Retailer 14HK$35,629 HKD
Retailer 23HK$35,629 HKD
Retailer 25HK$36,225 HKD
Retailer 15HK$38,174 HKD
Retailer 13HK$39,112 HKD
Retailer 5HK$40,015 HKD
Retailer 26HK$40,015 HKD
Retailer 17HK$40,586 HKD
Retailer 18HK$40,660 HKD
Retailer 4HK$41,114 HKD
Retailer 3HK$41,349 HKD
Retailer 2HK$41,966 HKD
Retailer 21HK$48,346 HKD
Retailer 19HK$56,925 HKD
Retailer 20HK$62,647 HKD
NZ JewellersHK$68,520 HKD

40 data points across 26 retailers

29 retailersHK$30,694 HKD to HK$68,520 HKD

A
Cheapest Retailer
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HK$30,694 HKD
$3,912 USD
A
Retailer 2
-
HK$30,725 HKD
$3,916 USD
View
A
Retailer 3
-
HK$31,052 HKD
$3,958 USD
View
A
Retailer 4
-
HK$31,071 HKD
$3,960 USD
View
A
Retailer 5
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HK$31,438 HKD
$4,007 USD
View
A
Retailer 6
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HK$32,495 HKD
A$6,372 AUD
View
A
Retailer 7
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HK$32,891 HKD
$4,192 USD
View
Final sale: no returns
A
Retailer 8
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HK$33,699 HKD
$4,295 USD
View
A
Retailer 9
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HK$35,398 HKD
$4,512 USD
View
Retailer 10
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HK$35,527 HKD
$4,528 USD
View
Price last confirmed 10 days ago
A
Retailer 11
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HK$35,629 HKD
$4,541 USD
View
A
Retailer 12
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HK$35,629 HKD
$4,541 USD
View
A
Retailer 13
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HK$35,629 HKD
$4,541 USD
View
A
Retailer 14
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HK$36,225 HKD
$4,617 USD
View
A
Retailer 15
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HK$37,475 HKD
A$7,348 AUD
View
A
Retailer 16
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HK$38,174 HKD
$4,865 USD
View
A
Retailer 17
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HK$39,112 HKD
£3,925 GBP
View
A
Retailer 18
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HK$40,015 HKD
$5,100 USD
View
A
Retailer 19
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HK$40,015 HKD
$5,100 USD
View
A
Retailer 20
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HK$40,586 HKD
$5,173 USD
View
Retailer 21
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HK$40,660 HKD
A$7,973 AUD
View
Price last confirmed 24 days ago
A
Retailer 22
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HK$41,114 HKD
$5,240 USD
View
A
Retailer 23
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HK$41,349 HKD
$5,270 USD
View
A
Retailer 24
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HK$41,966 HKD
€5,094 EUR
View
Retailer 25
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HK$42,165 HKD
$5,374 USD
View
Price last confirmed 57 days ago
B+
Retailer 26
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HK$48,346 HKD
ZAR 99,544 ZAR
View
Retailer 27
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HK$56,925 HKD
$7,255 USD
View
Price last confirmed 7 days ago
B+
Retailer 28
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HK$62,647 HKD
£6,287 GBP
View
Most Expensive
B
NZ Jewellers
cde40c29-89bd-459f-8487-001a75435224 · Oct 30
HK$68,520 HKD
$8,733 USD
View
28 more retailers have this diamond
Prices start from HK$30,694 HKDSave up to HK$37,826 HKD

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
1.51ct Radiant
HK$30,694 HKD