Oval|Natural|GIA

1.51ct E SI1 Oval Natural Diamond

ID • E/SI1 • GIA 6531137674

Certificate GIA 6531137674

Diamond specifications and retailer prices

From $11,767 AUD
$8,267 USD
As of October 26, 2026
Save $7,888 AUD (40%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $20,948 AUD at NZ Jewellers · As of September 28, 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 6531137674. Listed at 19 retailers as of October 26, 2026, with a 67% 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle37.3°
OriginNatural
Grading LabGIA
CertificateGIA 6531137674
Dimensions8.77 × 6.46 × 4.11 mm
L/W Ratio1.36
Top View
8.77 mm6.46 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531137674
Side View
Table 57.0%Crown 38.6°Girdle: STK-THKPavilion 37.3°Culet: NoneDepth 63.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: $13,744 AUD|Low: $11,145 AUD|High: $19,867 AUD|Avg: $13,951 AUD|+0.1%
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
October 30, 2026
Retailer 10$11,145 AUD
Retailer 5$11,604 AUD
Retailer 14$11,767 AUD
Retailer 13$12,476 AUD
Retailer 11$12,569 AUD
Retailer 6$12,674 AUD
Retailer 12$13,616 AUD
Retailer 1$13,744 AUD
Retailer 8$13,810 AUD
Retailer 2$14,761 AUD
Retailer 3$14,761 AUD
Retailer 4$15,259 AUD
Retailer 9$18,138 AUD
Retailer 7$19,655 AUD

42 data points across 14 retailers

19 retailers$11,767 AUD to $19,655 AUD

Retailer 1
-
$11,145 AUD
$7,830 USD
Price last confirmed 9 days ago
B+
Retailer 2
-
$11,767 AUD
$8,267 USD
View
B+
Retailer 3
-
$12,476 AUD
$8,765 USD
View
B+
Retailer 4
-
$12,569 AUD
$8,830 USD
View
Final sale: no returns
B+
Retailer 5
-
$12,569 AUD
$8,830 USD
View
B+
Retailer 6
-
$12,674 AUD
$8,904 USD
View
B+
Retailer 7
-
$13,400 AUD
$9,414 USD
View
Retailer 8
-
$13,616 AUD
$9,566 USD
View
Price last confirmed 31 days ago
B+
Retailer 9
-
$13,616 AUD
$9,566 USD
View
B+
Retailer 10
-
$13,744 AUD
£7,603 GBP
View
B+
Retailer 11
-
$13,810 AUD
View
B+
Retailer 12
-
$14,629 AUD
$10,277 USD
View
B+
Retailer 13
-
$14,761 AUD
$10,370 USD
View
B+
Retailer 14
-
$14,761 AUD
$10,370 USD
View
B+
Retailer 15
-
$15,259 AUD
$10,720 USD
View
Retailer 16
-
$15,711 AUD
$11,038 USD
View
Price last confirmed 31 days ago
Retailer 17
-
$18,138 AUD
ZAR 205,864 ZAR
View
Price last confirmed 7 days ago
B
Retailer 18
-
$19,655 AUD
£10,873 GBP
View
Most Expensive
NZ Jewellers
00c0aeb9-6e00-439a-b006-4463ad937dc4 · Sep 28
$20,948 AUD
$14,717 USD
View
Price last confirmed 32 days ago
18 more retailers have this diamond
Prices start from $11,767 AUDSave up to $7,888 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.

B+
1.51ct Oval
$11,767 AUD