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Oval|Natural|GIA

1.51ct I SI2 Oval Natural Diamond

ID • I/SI2 • GIA 1555553685

Certificate GIA 1555553685

Diamond specifications and retailer prices

From $6,197 AUD
$4,353 USD
As of October 31, 2026
Save $7,174 AUD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,370 AUD at NZ Jewellers · As of October 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555553685. Listed at 19 retailers as of October 30, 2026, with prices from $6,197 to $13,370, a $7,174 spread on the same certified stone. NZ Jewellers lists it at $13,370. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle37.83°
OriginNatural
Grading LabGIA
CertificateGIA 1555553685
Dimensions9.39 × 6.15 × 3.91 mm
L/W Ratio1.53
Girdle conditionVery Thick
Key to symbols
Twinning Wisp, Crystal, Feather, Indented Natural, Needle, Natural
Top View
9.39 mm6.15 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1555553685
Side View
Table 63.0%Crown 37.83°Girdle: MED-VTKPavilionCulet: 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 31
Current: $13,370 AUD|Low: $6,127 AUD|High: $13,370 AUD|Avg: $8,100 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
Retailer 18
Retailer 19
November 2, 2026
Retailer 17$6,178 AUD
Retailer 15$6,197 AUD
Retailer 5$6,315 AUD
Retailer 4$6,685 AUD
Retailer 6$6,741 AUD
Retailer 10$7,172 AUD
Retailer 16$7,242 AUD
Retailer 18$7,242 AUD
Retailer 19$7,242 AUD
Retailer 11$7,612 AUD
Retailer 12$7,798 AUD
Retailer 2$7,799 AUD
Retailer 8$8,115 AUD
Retailer 9$8,115 AUD
Retailer 3$8,357 AUD
Retailer 7$8,385 AUD
Retailer 13$9,046 AUD
Retailer 14$12,800 AUD
NZ Jewellers$13,370 AUD

37 data points across 19 retailers

19 retailers$6,197 AUD to $13,370 AUD

Retailer 1
-
$6,178 AUD
$4,340 USD
Price last confirmed 14 days ago
A
Retailer 2
-
$6,197 AUD
$4,353 USD
View
A
Retailer 3
-
$6,315 AUD
$4,436 USD
View
A
Retailer 4
-
$6,685 AUD
$4,696 USD
View
Final sale: no returns
A
Retailer 5
-
$6,741 AUD
$4,735 USD
View
A
Retailer 6
-
$7,172 AUD
$5,038 USD
View
A
Retailer 7
-
$7,242 AUD
$5,087 USD
View
A
Retailer 8
-
$7,242 AUD
$5,087 USD
View
A
Retailer 9
-
$7,242 AUD
$5,087 USD
View
B+
Retailer 10
-
$7,612 AUD
$5,347 USD
View
B+
Retailer 11
-
$7,798 AUD
£4,313 GBP
View
B+
Retailer 12
-
$7,799 AUD
£4,314 GBP
View
B+
Retailer 13
-
$8,115 AUD
$5,700 USD
View
B+
Retailer 14
-
$8,115 AUD
$5,700 USD
View
B+
Retailer 15
-
$8,357 AUD
$5,870 USD
View
B+
Retailer 16
-
$8,385 AUD
$5,890 USD
View
B+
Retailer 17
-
$9,046 AUD
€6,052 EUR
View
B
Retailer 18
-
$12,800 AUD
£7,080 GBP
View
Most Expensive
B
NZ Jewellers
5043f498-1c39-423c-940e-e73d23376a8c · Oct 30
$13,370 AUD
$9,392 USD
View
18 more retailers have this diamond
Prices start from $6,197 AUDSave up to $7,174 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
$6,197 AUD