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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566495423

Certificate GIA 2566495423

Diamond specifications and retailer prices

From $8,167 NZD
HK$35,900 HKD
As of November 1, 2026
Save $10,054 NZD (55%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,221 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566495423. Listed at 18 retailers as of October 30, 2026, with prices from $8,167 to $18,221, a $10,054 spread on the same certified stone. NZ Jewellers lists it at $18,221. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566495423
Dimensions7.33 × 7.37 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Pinpoint, Indented Natural
Top View
7.33 mm7.37 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566495423
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.8%

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 1
Current: $18,221 NZD|Low: $8,099 NZD|High: $18,221 NZD|Avg: $11,408 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
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 17$8,167 NZD
Retailer 13$8,662 NZD
Retailer 9$9,317 NZD
Retailer 8$9,551 NZD
Retailer 14$9,553 NZD
Retailer 11$10,382 NZD
Retailer 5$10,893 NZD
Retailer 6$10,893 NZD
Retailer 10$10,893 NZD
Retailer 3$11,064 NZD
Retailer 7$11,172 NZD
Retailer 2$11,204 NZD
Retailer 18$11,396 NZD
Retailer 12$11,852 NZD
Retailer 4$12,569 NZD
Retailer 16$13,385 NZD
Retailer 15$16,048 NZD
NZ Jewellers$18,221 NZD

11 data points across 18 retailers

18 retailers$8,167 NZD to $18,221 NZD

A
Cheapest Retailer
-
$8,167 NZD
HK$35,900 HKD
A
Retailer 2
-
$8,662 NZD
₹464,171 INR
View
A
Retailer 3
-
$9,317 NZD
SGD 7,084 SGD
View
A
Retailer 4
-
$9,551 NZD
$5,374 USD
View
A
Retailer 5
-
$9,553 NZD
$5,375 USD
View
B+
Retailer 6
-
$10,382 NZD
£4,599 GBP
View
B+
Retailer 7
-
$10,893 NZD
$6,129 USD
View
B+
Retailer 8
-
$10,893 NZD
$6,129 USD
View
B+
Retailer 9
-
$10,893 NZD
$6,129 USD
View
B+
Retailer 10
-
$11,064 NZD
$6,225 USD
View
B+
Retailer 11
-
$11,172 NZD
$6,286 USD
View
B+
Retailer 12
-
$11,204 NZD
£4,964 GBP
View
B+
Retailer 13
-
$11,396 NZD
$6,412 USD
View
B+
Retailer 14
-
$11,852 NZD
€6,351 EUR
View
B+
Retailer 15
-
$12,569 NZD
$7,072 USD
View
B
Retailer 16
-
$13,385 NZD
ZAR 121,661 ZAR
View
B
Retailer 17
-
$16,048 NZD
£7,110 GBP
View
Most Expensive
B
NZ Jewellers
ff341407-2ec3-4de4-9297-4dde2b7d59ee · Oct 30
$18,221 NZD
$10,252 USD
View
17 more retailers have this diamond
Prices start from $8,167 NZDSave up to $10,054 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 Round
$8,167 NZD