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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566054289

Certificate GIA 2566054289

Diamond specifications and retailer prices

From $9,762 NZD
$5,502 USD
As of November 1, 2026
Save $7,954 NZD (45%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $20,543 NZD at NZ Jewellers · As of September 28, 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 2566054289. Listed at 19 retailers as of November 1, 2026, with a 81% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566054289
Dimensions7.28 × 7.32 × 4.59 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Knot, Feather, Needle
Top View
7.28 mm7.32 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566054289
Side View
Table 56.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.8%

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: $13,074 NZD|Low: $9,762 NZD|High: $18,315 NZD|Avg: $12,549 NZD|-1.3%
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
November 2, 2026
Retailer 2$9,762 NZD
Retailer 5$10,043 NZD
Retailer 13$10,054 NZD
Retailer 3$10,179 NZD
Retailer 6$10,628 NZD
Retailer 15$10,699 NZD
Retailer 4$11,340 NZD
Retailer 7$11,728 NZD
Retailer 12$11,728 NZD
Retailer 8$12,109 NZD
Retailer 14$12,338 NZD
Retailer 1$13,074 NZD
Retailer 9$13,516 NZD
Retailer 11$15,619 NZD
Retailer 10$17,716 NZD

40 data points across 15 retailers

19 retailers$9,762 NZD to $17,716 NZD

A
Cheapest Retailer
-
$9,762 NZD
$5,502 USD
B+
Retailer 2
-
$10,043 NZD
$5,660 USD
View
B+
Retailer 3
-
$10,054 NZD
$5,666 USD
View
B+
Retailer 4
-
$10,179 NZD
$5,737 USD
View
B+
Retailer 5
-
$10,628 NZD
$5,990 USD
View
Final sale: no returns
B+
Retailer 6
-
$10,699 NZD
$6,030 USD
View
B+
Retailer 7
-
$11,340 NZD
$6,391 USD
View
B+
Retailer 8
-
$11,728 NZD
$6,610 USD
View
Retailer 9
-
$11,728 NZD
$6,610 USD
View
Price last confirmed 18 days ago
B+
Retailer 10
-
$12,109 NZD
£5,374 GBP
View
Retailer 11
-
$12,283 NZD
$6,923 USD
View
Price last confirmed 25 days ago
Retailer 12
-
$12,338 NZD
A$10,698 AUD
View
Price last confirmed 11 days ago
Retailer 13
-
$12,472 NZD
$7,029 USD
View
Price last confirmed 33 days ago
B+
Retailer 14
-
$13,074 NZD
£5,802 GBP
View
B+
Retailer 15
-
$13,516 NZD
€7,255 EUR
View
Retailer 16
-
$14,173 NZD
$7,988 USD
View
Price last confirmed 33 days ago
B
Retailer 17
-
$15,619 NZD
ZAR 142,210 ZAR
View
B
Retailer 18
-
$17,716 NZD
£7,862 GBP
View
Most Expensive
NZ Jewellers
2cc99845-ad31-4206-9a33-efb150097eb4 · Sep 28
$20,543 NZD
$11,578 USD
View
Price last confirmed 35 days ago
18 more retailers have this diamond
Prices start from $9,762 NZDSave up to $7,954 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
$9,762 NZD