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Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 1533355515

Certificate GIA 1533355515

Diamond specifications and retailer prices

From $13,502 NZD
As of November 5, 2026
Save $7,225 NZD (35%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $28,413 NZD at NZ Jewellers · As of October 11, 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 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 1533355515. Listed at 19 retailers as of November 5, 2026, with a 54% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.13°
Pavilion angle39.24°
OriginNatural
Grading LabGIA
CertificateGIA 1533355515
Dimensions8.87 × 6.40 × 4.01 mm
L/W Ratio1.39
Culet sizeNone
Top View
8.87 mm6.40 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1533355515
Side View
Table 58.0%Crown 39.13°Girdle: STK-THKPavilion 39.24°Culet: NoneDepth 62.6%

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: Nov 5
Current: $15,699 NZD|Low: $11,473 NZD|High: $24,418 NZD|Avg: $16,176 NZD|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 10$12,690 NZD
Retailer 5$13,210 NZD
Retailer 4$13,302 NZD
Retailer 14$13,502 NZD
Retailer 8$13,670 NZD
Retailer 18$14,152 NZD
Retailer 7$14,208 NZD
Retailer 6$15,138 NZD
Retailer 1$15,699 NZD
Retailer 17$15,753 NZD
Retailer 9$15,916 NZD
Retailer 13$15,927 NZD
Retailer 11$16,145 NZD
Retailer 2$16,866 NZD
Retailer 19$16,866 NZD
Retailer 15$17,204 NZD
Retailer 20$17,426 NZD
Retailer 16$17,620 NZD
Retailer 12$20,727 NZD
Retailer 3$23,959 NZD

28 data points across 20 retailers

19 retailers$13,502 NZD to $20,727 NZD

Retailer 1
-
$12,690 NZD
Price last confirmed 30 days ago
A
Retailer 2
-
$13,502 NZD
View
B+
Retailer 3
-
$14,152 NZD
View
B+
Retailer 4
-
$14,208 NZD
View
Final sale: no returns
Retailer 5
-
$14,208 NZD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$15,138 NZD
View
Retailer 7
-
$15,391 NZD
View
Price last confirmed 27 days ago
B+
Retailer 8
-
$15,699 NZD
View
B+
Retailer 9
-
$15,753 NZD
View
B+
Retailer 10
-
$15,916 NZD
View
Retailer 11
-
$16,145 NZD
View
Price last confirmed 33 days ago
B+
Retailer 12
-
$16,866 NZD
View
B+
Retailer 13
-
$16,866 NZD
View
B+
Retailer 14
-
$17,204 NZD
View
B+
Retailer 15
-
$17,426 NZD
View
B+
Retailer 16
-
$17,620 NZD
View
Retailer 17
-
$17,759 NZD
View
Price last confirmed 25 days ago
B
Retailer 18
-
$20,727 NZD
View
Most Expensive
NZ Jewellers
4a2962c9-f624-42b0-a771-d100a6d65180 · Oct 11
$28,413 NZD
$15,751 USD
View
Price last confirmed 26 days ago
18 more retailers have this diamond
Prices start from $13,502 NZDSave up to $7,225 NZD

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
$13,502 NZD