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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 $8,413 AUD
$5,910 USD
As of November 1, 2026
Save $6,501 AUD (44%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $14,914 AUD 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 $8,413 to $14,914, a $6,501 spread on the same certified stone. Wholesale Diamonds Direct lists it at $14,914. 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: $9,973 AUD|Low: $8,413 AUD|High: $15,089 AUD|Avg: $10,763 AUD|-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$8,413 AUD
Retailer 5$8,947 AUD
Retailer 2$9,909 AUD
Retailer 1$9,973 AUD
Retailer 10$10,210 AUD
Retailer 3$10,583 AUD
Retailer 6$10,705 AUD
Retailer 7$10,705 AUD
Retailer 8$11,061 AUD
Retailer 4$13,084 AUD
Wholesale Diamonds Direct$14,914 AUD

43 data points across 11 retailers

11 retailers$8,413 AUD to $14,914 AUD

A
Cheapest Retailer
-
$8,413 AUD
$5,910 USD
B+
Retailer 2
-
$8,947 AUD
$6,285 USD
View
B+
Retailer 3
-
$9,909 AUD
View
B+
Retailer 4
-
$9,973 AUD
£5,516 GBP
View
B+
Retailer 5
-
$10,210 AUD
$7,172 USD
View
B+
Retailer 6
-
$10,583 AUD
€7,080 EUR
View
B+
Retailer 7
-
$10,705 AUD
$7,520 USD
View
B+
Retailer 8
-
$10,705 AUD
$7,520 USD
View
B
Retailer 9
-
$11,061 AUD
$7,770 USD
View
B
Retailer 10
-
$13,084 AUD
ZAR 148,475 ZAR
View
Most Expensive
B
Wholesale Diamonds Direct
246709547 · Oct 26
$14,914 AUD
$10,477 USD
View
10 more retailers have this diamond
Prices start from $8,413 AUDSave up to $6,501 AUD

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
$8,413 AUD