Oval|Natural|GIA

1.51ct E SI1 Oval Natural Diamond

EX • E/SI1 • GIA 6542053783

Certificate GIA 6542053783

Diamond specifications and retailer prices

From $11,818 AUD
₹790,618 INR
As of October 30, 2026
Save $8,520 AUD (42%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $21,589 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval 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 stated by the retailer rather than the lab and certified by GIA 6542053783. Listed at 22 retailers as of October 29, 2026, with a 72% 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.99°
Pavilion angle40°
OriginNatural
Grading LabGIA
CertificateGIA 6542053783
Dimensions9.18 × 6.38 × 4.06 mm
L/W Ratio1.44
Top View
9.18 mm6.38 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542053783
Side View
Table 59.0%Crown 34.99°Girdle: THK-VTKPavilion 40°Culet: NoneDepth 63.6%

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 30
Current: $11,818 AUD|Low: $11,805 AUD|High: $20,473 AUD|Avg: $15,073 AUD|-0.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 1$11,818 AUD
Retailer 11$13,066 AUD
Retailer 3$13,267 AUD
Retailer 4$14,170 AUD
Retailer 9$14,297 AUD
Retailer 10$14,376 AUD
Retailer 7$15,737 AUD
Retailer 6$16,296 AUD
Retailer 2$17,022 AUD
Retailer 8$18,810 AUD
Retailer 5$20,338 AUD

33 data points across 11 retailers

22 retailers$11,818 AUD to $20,338 AUD

A
Cheapest Retailer
-
$11,818 AUD
₹790,618 INR
B+
Retailer 2
-
$13,066 AUD
$9,178 USD
View
B+
Retailer 3
-
$13,107 AUD
$9,207 USD
View
B+
Retailer 4
-
$13,267 AUD
$9,319 USD
View
B+
Retailer 5
-
$13,520 AUD
$9,497 USD
View
B+
Retailer 6
-
$14,143 AUD
$9,935 USD
View
B+
Retailer 7
-
$14,170 AUD
£7,838 GBP
View
B
Retailer 8
-
$14,297 AUD
$10,043 USD
View
Final sale: no returns
Retailer 9
-
$14,299 AUD
$10,044 USD
View
Price last confirmed 18 days ago
Retailer 10
-
$14,376 AUD
View
Price last confirmed 26 days ago
B+
Retailer 11
-
$15,461 AUD
$10,860 USD
View
Retailer 12
-
$15,490 AUD
$10,881 USD
View
Price last confirmed 38 days ago
Retailer 13
-
$15,490 AUD
$10,881 USD
View
Price last confirmed 22 days ago
B
Retailer 14
-
$15,737 AUD
$11,054 USD
View
B
Retailer 15
-
$15,849 AUD
$11,133 USD
View
B+
Retailer 16
-
$16,296 AUD
€10,902 EUR
View
B
Retailer 17
-
$17,022 AUD
$11,957 USD
View
Retailer 18
-
$17,873 AUD
$12,555 USD
View
Price last confirmed 21 days ago
Retailer 19
-
$17,873 AUD
$12,555 USD
View
Price last confirmed 38 days ago
Retailer 20
-
$18,810 AUD
ZAR 213,455 ZAR
View
Price last confirmed 18 days ago
B
Retailer 21
-
$20,338 AUD
£11,249 GBP
View
Most Expensive
NZ Jewellers
c1c1720f-1bfa-4368-bb32-1914ca9ab0ec · Sep 30
$21,589 AUD
$15,165 USD
View
Price last confirmed 30 days ago
21 more retailers have this diamond
Prices start from $11,818 AUDSave up to $8,520 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 Oval
$11,818 AUD