Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1543994919

Certificate GIA 1543994919

Diamond specifications and retailer prices

From $10,483 AUD
$7,365 USD
As of October 29, 2026
Save $8,890 AUD (46%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $23,994 AUD at NZ Jewellers · As of September 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 1543994919. Listed at 19 retailers as of October 29, 2026, with a 85% 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

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1543994919
Dimensions7.28 × 7.31 × 4.57 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.28 mm7.31 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1543994919
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

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: $10,998 AUD|Low: $9,517 AUD|High: $19,476 AUD|Avg: $13,176 AUD|+15.6%
Retailer 1
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
October 30, 2026
Retailer 15$10,483 AUD
Retailer 4$10,826 AUD
Retailer 1$10,998 AUD
Retailer 16$11,135 AUD
Retailer 3$11,508 AUD
Retailer 5$11,562 AUD
Retailer 2$12,323 AUD
Retailer 7$12,738 AUD
Retailer 12$12,774 AUD
Retailer 9$12,823 AUD
Retailer 10$12,831 AUD
Retailer 6$12,940 AUD
Retailer 14$14,013 AUD
Retailer 8$15,409 AUD
Retailer 13$16,686 AUD
Retailer 11$19,373 AUD

34 data points across 16 retailers

19 retailers$10,483 AUD to $19,373 AUD

A
Cheapest Retailer
-
$10,483 AUD
$7,365 USD
A
Retailer 2
-
$10,826 AUD
$7,606 USD
View
A
Retailer 3
-
$10,998 AUD
$7,727 USD
View
A
Retailer 4
-
$11,135 AUD
$7,823 USD
View
A
Retailer 5
-
$11,508 AUD
$8,085 USD
View
B+
Retailer 6
-
$11,562 AUD
$8,123 USD
View
Final sale: no returns
B+
Retailer 7
-
$12,323 AUD
$8,657 USD
View
Retailer 8
-
$12,738 AUD
$8,949 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
$12,774 AUD
View
B+
Retailer 10
-
$12,823 AUD
£7,093 GBP
View
B+
Retailer 11
-
$12,831 AUD
$9,014 USD
View
B+
Retailer 12
-
$12,940 AUD
$9,091 USD
View
Retailer 13
-
$12,997 AUD
$9,131 USD
View
Price last confirmed 31 days ago
B+
Retailer 14
-
$14,013 AUD
$9,845 USD
View
Retailer 15
-
$14,997 AUD
$10,536 USD
View
Price last confirmed 59 days ago
Retailer 16
-
$14,997 AUD
$10,536 USD
View
Price last confirmed 32 days ago
Retailer 17
-
$16,686 AUD
ZAR 189,383 ZAR
View
Price last confirmed 7 days ago
B
Retailer 18
-
$19,373 AUD
£10,717 GBP
View
Most Expensive
NZ Jewellers
5239c466-c2e3-4e18-a2db-1163951c3b6d · Sep 28
$23,994 AUD
$16,857 USD
View
Price last confirmed 32 days ago
18 more retailers have this diamond
Prices start from $10,483 AUDSave up to $8,890 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
$10,483 AUD