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Round|Natural|GIA

1.59ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2554325585

Certificate GIA 2554325585

Diamond specifications and retailer prices

From $10,486 NZD
$5,910 USD
As of November 1, 2026
Save $8,102 NZD (44%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $18,588 NZD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.59ct natural round diamond

This 1.59ct 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 2554325585. Listed at 11 retailers as of October 26, 2026, with prices from $10,486 to $18,588, a $8,102 spread on the same certified stone. Wholesale Diamonds Direct lists it at $18,588. 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

1.59
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2554325585
Dimensions7.46 × 7.41 × 4.67 mm
L/W Ratio1.01
Star length50%
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.46 mm7.41 mm1.59 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2554325585
Side View
Table 56.0%Crown 36°Girdle: MED-STKPavilion 41°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: $12,429 NZD|Low: $10,486 NZD|High: $18,806 NZD|Avg: $13,414 NZD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
November 2, 2026
Retailer 9$10,486 NZD
Retailer 5$11,151 NZD
Retailer 2$12,349 NZD
Retailer 1$12,429 NZD
Retailer 10$12,725 NZD
Retailer 3$13,190 NZD
Retailer 6$13,343 NZD
Retailer 7$13,343 NZD
Retailer 8$13,786 NZD
Retailer 4$16,307 NZD
Wholesale Diamonds Direct$18,588 NZD

43 data points across 11 retailers

11 retailers$10,486 NZD to $18,588 NZD

A
Cheapest Retailer
-
$10,486 NZD
$5,910 USD
B+
Retailer 2
-
$11,151 NZD
$6,285 USD
View
B+
Retailer 3
-
$12,349 NZD
A$10,708 AUD
View
B+
Retailer 4
-
$12,429 NZD
£5,516 GBP
View
B+
Retailer 5
-
$12,725 NZD
$7,172 USD
View
B+
Retailer 6
-
$13,190 NZD
€7,080 EUR
View
B+
Retailer 7
-
$13,343 NZD
$7,520 USD
View
B+
Retailer 8
-
$13,343 NZD
$7,520 USD
View
B
Retailer 9
-
$13,786 NZD
$7,770 USD
View
B
Retailer 10
-
$16,307 NZD
ZAR 148,475 ZAR
View
Most Expensive
B
Wholesale Diamonds Direct
246709547 · Oct 26
$18,588 NZD
$10,477 USD
View
10 more retailers have this diamond
Prices start from $10,486 NZDSave up to $8,102 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
1.59ct Round
$10,486 NZD