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Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

VG • H/SI1 • GIA 1543780428

Certificate GIA 1543780428

Diamond specifications and retailer prices

From $7,494 AUD
As of November 4, 2026
Save $9,451 AUD (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $16,945 AUD at NZ Jewellers · As of October 20, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1543780428. Listed at 20 retailers as of November 2, 2026, with a 126% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1543780428
Dimensions8.94 × 6.33 × 3.98 mm
L/W Ratio1.41
Top View
8.94 mm6.33 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1543780428
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NDepth 62.8%

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 4
Current: $16,945 AUD|Low: $7,494 AUD|High: $16,945 AUD|Avg: $10,283 AUD
NZ Jewellers
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
Retailer 17
November 5, 2026
Retailer 8$7,494 AUD
Retailer 6$8,005 AUD
Retailer 17$8,175 AUD
Retailer 4$8,472 AUD
Retailer 3$8,536 AUD
Retailer 7$9,179 AUD
Retailer 13$9,179 AUD
Retailer 14$9,179 AUD
Retailer 11$9,527 AUD
Retailer 2$9,620 AUD
Retailer 5$9,936 AUD
Retailer 9$10,367 AUD
Retailer 16$10,591 AUD
Retailer 12$11,025 AUD
Retailer 15$12,448 AUD
Retailer 10$14,886 AUD
NZ Jewellers$16,945 AUD

32 data points across 17 retailers

20 retailers$7,494 AUD to $16,945 AUD

B+
Cheapest Retailer
-
$7,494 AUD
B+
Retailer 2
-
$8,005 AUD
View
B+
Retailer 3
-
$8,175 AUD
View
B+
Retailer 4
-
$8,472 AUD
View
Final sale: no returns
B+
Retailer 5
-
$8,536 AUD
View
B+
Retailer 6
-
$9,179 AUD
View
B+
Retailer 7
-
$9,179 AUD
View
Retailer 8
-
$9,179 AUD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
$9,527 AUD
View
B+
Retailer 10
-
$9,620 AUD
View
Retailer 11
-
$9,936 AUD
View
Price last confirmed 33 days ago
B
Retailer 12
-
$10,367 AUD
View
B
Retailer 13
-
$10,591 AUD
View
Retailer 14
-
$10,591 AUD
View
Price last confirmed 16 days ago
B
Retailer 15
-
$11,025 AUD
View
B
Retailer 16
-
$11,102 AUD
View
B
Retailer 17
-
$12,448 AUD
View
B
Retailer 18
-
$14,886 AUD
View
C
Retailer 19
-
$16,945 AUD
View
Most Expensive
NZ Jewellers
ba9e204b-b270-448a-8ee8-1eb3b6cd3702 · Oct 20
$16,945 AUD
$11,643 USD
View
Price last confirmed 16 days ago
19 more retailers have this diamond
Prices start from $7,494 AUDSave up to $9,451 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
$7,494 AUD