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Oval|Natural|GIA

1.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6555496656

Certificate GIA 6555496656

Diamond specifications and retailer prices

From $13,646 NZD
$7,678 USD
As of November 1, 2026
Save $14,723 NZD (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $28,369 NZD 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555496656. Listed at 21 retailers as of October 30, 2026, with prices from $13,646 to $28,369, a $14,723 spread on the same certified stone. NZ Jewellers lists it at $28,369. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle37.7°
OriginNatural
Grading LabGIA
CertificateGIA 6555496656
Dimensions9.18 × 6.40 × 4.01 mm
L/W Ratio1.43
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
9.18 mm6.40 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555496656
Side View
Table 62.0%Crown 37.5°Girdle: THN-THKPavilion 37.7°Culet: NoneDepth 62.5%

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 1
Current: $28,369 NZD|Low: $13,810 NZD|High: $28,369 NZD|Avg: $17,651 NZD
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
November 2, 2026
Retailer 15$13,810 NZD
Retailer 3$14,317 NZD
Retailer 7$15,249 NZD
Retailer 4$15,656 NZD
Retailer 11$15,656 NZD
Retailer 14$15,665 NZD
Retailer 2$15,703 NZD
Retailer 5$16,176 NZD
Retailer 13$16,961 NZD
Retailer 12$17,222 NZD
Retailer 6$17,521 NZD
Retailer 10$19,572 NZD
Retailer 9$20,838 NZD
Retailer 8$23,639 NZD
NZ Jewellers$28,369 NZD

45 data points across 15 retailers

21 retailers$13,646 NZD to $28,369 NZD

B+
Cheapest Retailer
-
$13,646 NZD
$7,678 USD
B+
Retailer 2
-
$13,810 NZD
$7,770 USD
View
B+
Retailer 3
-
$14,317 NZD
SGD 10,886 SGD
View
B+
Retailer 4
-
$14,659 NZD
$8,248 USD
View
B
Retailer 5
-
$15,249 NZD
$8,580 USD
View
B
Retailer 6
-
$15,542 NZD
$8,745 USD
View
B+
Retailer 7
-
$15,656 NZD
$8,809 USD
View
Final sale: no returns
B+
Retailer 8
-
$15,656 NZD
$8,809 USD
View
Retailer 9
-
$15,665 NZD
A$13,560 AUD
View
Price last confirmed 10 days ago
B+
Retailer 10
-
$15,703 NZD
£6,957 GBP
View
B
Retailer 11
-
$16,729 NZD
$9,412 USD
View
B
Retailer 12
-
$16,961 NZD
$9,543 USD
View
Retailer 13
-
$16,961 NZD
$9,543 USD
View
Price last confirmed 8 days ago
B
Retailer 14
-
$17,222 NZD
$9,690 USD
View
B
Retailer 15
-
$17,341 NZD
$9,757 USD
View
B
Retailer 16
-
$17,521 NZD
$9,858 USD
View
Retailer 17
-
$19,572 NZD
$11,012 USD
View
Price last confirmed 63 days ago
B
Retailer 18
-
$19,572 NZD
$11,012 USD
View
B
Retailer 19
-
$20,838 NZD
ZAR 189,411 ZAR
View
B
Retailer 20
-
$23,639 NZD
£10,473 GBP
View
Most Expensive
B
NZ Jewellers
5d7088cb-e287-4cbf-91e0-5155794ec581 · Oct 30
$28,369 NZD
$15,962 USD
View
20 more retailers have this diamond
Prices start from $13,646 NZDSave up to $14,723 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.

B+
1.51ct Oval
$13,646 NZD