Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 7516255976

Certificate GIA 7516255976

Diamond specifications and retailer prices

From $10,619 AUD
$7,442 USD
As of November 2, 2026
Save $6,714 AUD (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $20,801 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 F 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 7516255976. Listed at 16 retailers as of November 1, 2026, with a 63% 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.55°
Pavilion angle39.32°
OriginNatural
Grading LabGIA
CertificateGIA 7516255976
Dimensions8.87 × 6.32 × 4.07 mm
L/W Ratio1.40
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Indented Natural, Natural
Top View
8.87 mm6.32 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7516255976
Side View
Table 57.0%Crown 36.55°Girdle: STK-VTKPavilion 39.32°Culet: NoneDepth 64.4%

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: Nov 2
Current: $11,636 AUD|Low: $10,523 AUD|High: $17,542 AUD|Avg: $12,389 AUD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 9$10,619 AUD
Retailer 2$10,750 AUD
Retailer 10$11,429 AUD
Retailer 8$11,479 AUD
Retailer 4$11,494 AUD
Retailer 1$11,636 AUD
Retailer 7$11,777 AUD
Retailer 3$13,586 AUD
Retailer 6$15,279 AUD
Retailer 5$17,333 AUD

35 data points across 10 retailers

16 retailers$10,619 AUD to $17,333 AUD

B+
Cheapest Retailer
-
$10,619 AUD
$7,442 USD
B+
Retailer 2
-
$10,750 AUD
$7,534 USD
View
B+
Retailer 3
-
$11,429 AUD
$8,010 USD
View
B+
Retailer 4
-
$11,479 AUD
$8,045 USD
View
Final sale: no returns
Retailer 5
-
$11,481 AUD
$8,046 USD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$11,494 AUD
£6,343 GBP
View
B+
Retailer 7
-
$11,636 AUD
£6,421 GBP
View
Retailer 8
-
$11,777 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
$12,437 AUD
$8,716 USD
View
Price last confirmed 25 days ago
B
Retailer 10
-
$12,475 AUD
$8,742 USD
View
Retailer 11
-
$12,628 AUD
$8,850 USD
View
Price last confirmed 33 days ago
B
Retailer 12
-
$13,586 AUD
€9,068 EUR
View
Retailer 13
-
$14,350 AUD
$10,057 USD
View
Price last confirmed 24 days ago
B
Retailer 14
-
$15,279 AUD
ZAR 172,991 ZAR
View
B
Retailer 15
-
$17,333 AUD
£9,565 GBP
View
Most Expensive
NZ Jewellers
7d235d39-6a53-4af6-a403-d2c7af3c6082 · Sep 30
$20,801 AUD
$14,578 USD
View
Price last confirmed 33 days ago
15 more retailers have this diamond
Prices start from $10,619 AUDSave up to $6,714 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
$10,619 AUD