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Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1538904520

Certificate GIA 1538904520

Diamond specifications and retailer prices

From $10,586 AUD
HK$58,100 HKD
As of October 29, 2026
Save $9,436 AUD (47%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $20,022 AUD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1538904520. Listed at 25 retailers as of October 27, 2026, with prices from $10,586 to $20,022, a $9,436 spread on the same certified stone. NZ Jewellers lists it at $20,022. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1538904520
Dimensions7.31 × 7.26 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
7.31 mm7.26 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1538904520
Side View
Table 57.0%Crown 34.5°Girdle: Sli. ThickPavilion 41.4°Culet: NoneDepth 63.0%

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 29
Current: $20,022 AUD|Low: $10,586 AUD|High: $20,022 AUD|Avg: $13,757 AUD
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
October 29, 2026
Retailer 21$10,586 AUD
Retailer 11$10,611 AUD
Retailer 3$10,750 AUD
Retailer 8$11,093 AUD
Retailer 10$11,144 AUD
Retailer 19$11,836 AUD
Retailer 2$11,902 AUD
Retailer 5$11,902 AUD
Retailer 7$12,156 AUD
Retailer 22$12,801 AUD
Retailer 13$12,846 AUD
Retailer 4$12,893 AUD
Retailer 25$13,092 AUD
Retailer 15$13,187 AUD
Retailer 6$13,593 AUD
Retailer 9$13,593 AUD
Retailer 12$14,049 AUD
Retailer 23$14,723 AUD
Retailer 14$14,881 AUD
Retailer 17$15,015 AUD
Retailer 20$15,351 AUD
Retailer 18$15,814 AUD
Retailer 16$17,336 AUD
Retailer 24$19,941 AUD
NZ Jewellers$20,022 AUD

18 data points across 25 retailers

25 retailers$10,586 AUD to $20,022 AUD

A
Cheapest Retailer
-
$10,586 AUD
HK$58,100 HKD
A
Retailer 2
-
$10,611 AUD
$7,455 USD
View
A
Retailer 3
-
$10,750 AUD
$7,552 USD
View
A
Retailer 4
-
$11,093 AUD
$7,793 USD
View
A
Retailer 5
-
$11,144 AUD
$7,829 USD
View
B+
Retailer 6
-
$11,836 AUD
$8,315 USD
View
A
Retailer 7
-
$11,902 AUD
$8,362 USD
View
B+
Retailer 8
-
$11,902 AUD
$8,362 USD
View
Final sale: no returns
B+
Retailer 9
-
$12,156 AUD
$8,540 USD
View
B+
Retailer 10
-
$12,801 AUD
$8,993 USD
View
B+
Retailer 11
-
$12,846 AUD
£7,106 GBP
View
B+
Retailer 12
-
$12,893 AUD
$9,058 USD
View
B+
Retailer 13
-
$13,092 AUD
$9,198 USD
View
B+
Retailer 14
-
$13,187 AUD
View
B+
Retailer 15
-
$13,593 AUD
$9,550 USD
View
B+
Retailer 16
-
$13,593 AUD
$9,550 USD
View
B+
Retailer 17
-
$14,049 AUD
$9,870 USD
View
B+
Retailer 18
-
$14,723 AUD
£8,145 GBP
View
B+
Retailer 19
-
$14,881 AUD
€9,957 EUR
View
B
Retailer 20
-
$15,015 AUD
$10,549 USD
View
B+
Retailer 21
-
$15,351 AUD
$10,785 USD
View
B+
Retailer 22
-
$15,814 AUD
$11,110 USD
View
B
Retailer 23
-
$17,336 AUD
ZAR 196,753 ZAR
View
Price last confirmed 7 days ago
B
Retailer 24
-
$19,941 AUD
£11,031 GBP
View
Most Expensive
B
NZ Jewellers
02c63f2b-ddb7-4ac2-8ebd-2141d1ef2b1a · Oct 27
$20,022 AUD
$14,066 USD
View
24 more retailers have this diamond
Prices start from $10,586 AUDSave up to $9,436 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 Round
$10,586 AUD