Oval|Natural|GIA

1.50ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 6551278598

Certificate GIA 6551278598

Diamond specifications and retailer prices

From $6,833 AUD
HK$37,500 HKD
As of October 31, 2026
Save $6,779 AUD (50%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,866 AUD at NZ Jewellers · As of August 30, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct natural oval sits in the one-and-a-half to two carat band, graded D 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 6551278598. Listed at 18 retailers as of October 29, 2026, with a 99% 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

1.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551278598
Dimensions8.92 × 6.52 × 4.11 mm
L/W Ratio1.37
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
8.92 mm6.52 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551278598
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 63.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $11,296 AUD|Low: $6,760 AUD|High: $14,872 AUD|Avg: $9,464 AUD|-12.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 5$6,833 AUD
Retailer 12$7,783 AUD
Retailer 2$8,015 AUD
Retailer 10$8,038 AUD
Retailer 11$8,482 AUD
Retailer 9$8,542 AUD
Retailer 6$8,815 AUD
Retailer 4$8,882 AUD
Retailer 3$9,085 AUD
Retailer 7$10,042 AUD
Retailer 1$11,296 AUD
Retailer 8$13,612 AUD

35 data points across 12 retailers

18 retailers$6,833 AUD to $13,612 AUD

A
Cheapest Retailer
-
$6,833 AUD
HK$37,500 HKD
Retailer 2
-
$7,783 AUD
SGD 7,388 SGD
View
Price last confirmed 17 days ago
A
Retailer 3
-
$8,015 AUD
$5,630 USD
View
A
Retailer 4
-
$8,038 AUD
$5,646 USD
View
A
Retailer 5
-
$8,482 AUD
$5,958 USD
View
Final sale: no returns
A
Retailer 6
-
$8,542 AUD
$6,000 USD
View
Retailer 7
-
$8,724 AUD
$6,128 USD
View
Price last confirmed 23 days ago
A
Retailer 8
-
$8,815 AUD
£4,876 GBP
View
Retailer 9
-
$9,085 AUD
View
Price last confirmed 21 days ago
Retailer 10
-
$9,189 AUD
$6,455 USD
View
Price last confirmed 21 days ago
A
Retailer 11
-
$10,042 AUD
€6,718 EUR
View
Retailer 12
-
$10,658 AUD
$7,487 USD
View
Price last confirmed 31 days ago
Retailer 13
-
$10,905 AUD
$7,660 USD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
$11,296 AUD
ZAR 128,193 ZAR
View
Retailer 15
-
$12,716 AUD
$8,932 USD
View
Price last confirmed 46 days ago
B+
Retailer 16
-
$13,612 AUD
£7,529 GBP
View
Retailer 17
-
$15,808 AUD
$11,104 USD
View
Price last confirmed 22 days ago
Most Expensive
NZ Jewellers
5d398fb2-e47e-4d8d-9c9c-99cae6142bd8 · Aug 30
$18,866 AUD
$13,252 USD
View
Price last confirmed 62 days ago
17 more retailers have this diamond
Prices start from $6,833 AUDSave up to $6,779 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
1.50ct Oval
$6,833 AUD