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Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6512752915

Certificate GIA 6512752915

Diamond specifications and retailer prices

From $9,511 AUD
HK$52,200 HKD
As of October 29, 2026
Save $11,876 AUD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $21,387 AUD at NZ Jewellers · As of October 28, 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 6512752915. Listed at 19 retailers as of October 28, 2026, with prices from $9,511 to $21,387, a $11,876 spread on the same certified stone. NZ Jewellers lists it at $21,387. 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°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6512752915
Dimensions7.41 × 7.36 × 4.47 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.41 mm7.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512752915
Side View
Table 59.0%Crown 34°Girdle: ThickPavilion 40.6°Culet: NoneDepth 60.5%

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: $21,387 AUD|Low: $9,511 AUD|High: $21,387 AUD|Avg: $12,320 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
October 29, 2026
Retailer 10$9,511 AUD
Retailer 7$9,544 AUD
Retailer 11$10,012 AUD
Retailer 4$10,668 AUD
Retailer 6$10,693 AUD
Retailer 15$10,694 AUD
Retailer 14$11,392 AUD
Retailer 5$11,585 AUD
Retailer 19$11,763 AUD
Retailer 12$11,770 AUD
Retailer 16$12,127 AUD
Retailer 9$12,764 AUD
Retailer 3$13,367 AUD
Retailer 8$13,579 AUD
Retailer 13$13,898 AUD
Retailer 17$14,080 AUD
Retailer 18$15,431 AUD
Retailer 2$17,916 AUD
NZ Jewellers$21,387 AUD

39 data points across 19 retailers

19 retailers$9,511 AUD to $21,387 AUD

A
Cheapest Retailer
-
$9,511 AUD
HK$52,200 HKD
A
Retailer 2
-
$9,544 AUD
$6,705 USD
View
A
Retailer 3
-
$10,012 AUD
$7,034 USD
View
A
Retailer 4
-
$10,668 AUD
$7,495 USD
View
A
Retailer 5
-
$10,693 AUD
$7,512 USD
View
Final sale: no returns
A
Retailer 6
-
$10,694 AUD
$7,513 USD
View
A
Retailer 7
-
$11,392 AUD
$8,004 USD
View
B+
Retailer 8
-
$11,585 AUD
$8,139 USD
View
B+
Retailer 9
-
$11,763 AUD
$8,264 USD
View
A
Retailer 10
-
$11,770 AUD
£6,511 GBP
View
B+
Retailer 11
-
$12,127 AUD
View
B+
Retailer 12
-
$12,764 AUD
$8,967 USD
View
B+
Retailer 13
-
$13,367 AUD
$9,391 USD
View
B+
Retailer 14
-
$13,579 AUD
$9,540 USD
View
B+
Retailer 15
-
$13,898 AUD
€9,299 EUR
View
B+
Retailer 16
-
$14,080 AUD
$9,892 USD
View
B+
Retailer 17
-
$15,431 AUD
ZAR 175,142 ZAR
View
Price last confirmed 7 days ago
B
Retailer 18
-
$17,916 AUD
£9,911 GBP
View
Most Expensive
B
NZ Jewellers
6ce93c74-746a-4bb5-80ce-0577f7010937 · Oct 27
$21,387 AUD
$15,025 USD
View
18 more retailers have this diamond
Prices start from $9,511 AUDSave up to $11,876 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
$9,511 AUD