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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 $5,582 AUD
$3,912 USD
As of November 2, 2026
Save $6,879 AUD (55%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $12,461 AUD 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 $5,582 to $12,461, a $6,879 spread on the same certified stone. NZ Jewellers lists it at $12,461. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $12,461 AUD|Low: $4,826 AUD|High: $12,461 AUD|Avg: $7,282 AUD
NZ Jewellers
Retailer 2
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Retailer 5
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Retailer 7
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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 11$5,582 AUD
Retailer 8$5,588 AUD
Retailer 22$5,647 AUD
Retailer 7$5,651 AUD
Retailer 12$5,717 AUD
Retailer 10$5,982 AUD
Retailer 24$6,129 AUD
Retailer 9$6,438 AUD
Retailer 16$6,461 AUD
Retailer 6$6,480 AUD
Retailer 14$6,480 AUD
Retailer 23$6,480 AUD
Retailer 25$6,588 AUD
Retailer 15$6,942 AUD
Retailer 13$7,113 AUD
Retailer 5$7,277 AUD
Retailer 26$7,277 AUD
Retailer 17$7,381 AUD
Retailer 18$7,395 AUD
Retailer 4$7,477 AUD
Retailer 3$7,520 AUD
Retailer 2$7,632 AUD
Retailer 21$8,792 AUD
Retailer 19$10,353 AUD
Retailer 20$11,393 AUD
NZ Jewellers$12,461 AUD

40 data points across 26 retailers

29 retailers$5,582 AUD to $12,461 AUD

A
Cheapest Retailer
-
$5,582 AUD
$3,912 USD
A
Retailer 2
-
$5,588 AUD
$3,916 USD
View
A
Retailer 3
-
$5,647 AUD
$3,958 USD
View
A
Retailer 4
-
$5,651 AUD
$3,960 USD
View
A
Retailer 5
-
$5,717 AUD
$4,007 USD
View
A
Retailer 6
-
$5,910 AUD
View
A
Retailer 7
-
$5,982 AUD
$4,192 USD
View
Final sale: no returns
A
Retailer 8
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$6,129 AUD
$4,295 USD
View
A
Retailer 9
-
$6,438 AUD
$4,512 USD
View
Retailer 10
-
$6,461 AUD
$4,528 USD
View
Price last confirmed 10 days ago
A
Retailer 11
-
$6,480 AUD
$4,541 USD
View
A
Retailer 12
-
$6,480 AUD
$4,541 USD
View
A
Retailer 13
-
$6,480 AUD
$4,541 USD
View
A
Retailer 14
-
$6,588 AUD
$4,617 USD
View
A
Retailer 15
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$6,815 AUD
View
A
Retailer 16
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$6,942 AUD
$4,865 USD
View
A
Retailer 17
-
$7,113 AUD
£3,925 GBP
View
A
Retailer 18
-
$7,277 AUD
$5,100 USD
View
A
Retailer 19
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$7,277 AUD
$5,100 USD
View
A
Retailer 20
-
$7,381 AUD
$5,173 USD
View
Retailer 21
-
$7,395 AUD
View
Price last confirmed 23 days ago
A
Retailer 22
-
$7,477 AUD
$5,240 USD
View
A
Retailer 23
-
$7,520 AUD
$5,270 USD
View
A
Retailer 24
-
$7,632 AUD
€5,094 EUR
View
Retailer 25
-
$7,668 AUD
$5,374 USD
View
Price last confirmed 56 days ago
B+
Retailer 26
-
$8,792 AUD
ZAR 99,544 ZAR
View
B
Retailer 27
-
$10,353 AUD
$7,255 USD
View
B+
Retailer 28
-
$11,393 AUD
£6,287 GBP
View
Most Expensive
B
NZ Jewellers
cde40c29-89bd-459f-8487-001a75435224 · Oct 30
$12,461 AUD
$8,733 USD
View
28 more retailers have this diamond
Prices start from $5,582 AUDSave up to $6,879 AUD

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
$5,582 AUD