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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 $5,910 USD
As of October 30, 2026
Save $4,567 USD (44%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $10,477 USD 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 $5,910 to $10,477, a $4,567 spread on the same certified stone. Wholesale Diamonds Direct lists it at $10,477. 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
Color
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: Oct 30
Current: $7,434 USD|Low: $5,910 USD|High: $10,599 USD|Avg: $7,560 USD|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
November 1, 2026
Retailer 9$5,910 USD
Retailer 5$6,285 USD
Retailer 2$6,960 USD
Retailer 3$7,005 USD
Retailer 10$7,172 USD
Retailer 1$7,434 USD
Retailer 6$7,520 USD
Retailer 7$7,520 USD
Retailer 8$7,770 USD
Retailer 4$9,191 USD
Wholesale Diamonds Direct$10,477 USD

43 data points across 11 retailers

11 retailers$5,910 USD to $10,477 USD

A
Cheapest Retailer
-
$5,910 USD
B+
Retailer 2
-
$6,285 USD
View
B+
Retailer 3
-
$6,960 USD
A$10,708 AUD
View
B+
Retailer 4
-
$7,005 USD
£5,516 GBP
View
B+
Retailer 5
-
$7,172 USD
View
B+
Retailer 6
-
$7,434 USD
€7,080 EUR
View
B+
Retailer 7
-
$7,520 USD
View
B+
Retailer 8
-
$7,520 USD
View
B
Retailer 9
-
$7,770 USD
View
B
Retailer 10
-
$9,191 USD
ZAR 148,475 ZAR
View
Most Expensive
B
Wholesale Diamonds Direct
246709547 · Oct 26
$10,477 USD
View
10 more retailers have this diamond
Prices start from $5,910 USDSave up to $4,567 USD

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
$5,910 USD