Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2558368590

Certificate GIA 2558368590

Diamond specifications and retailer prices

From $2,380 USD
As of November 4, 2026
Save $2,871 USD (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,169 USD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558368590. Listed at 20 retailers as of November 4, 2026, with a 121% 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

1.00
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558368590
Dimensions6.46 × 6.42 × 3.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.46 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558368590
Side View
Table 59.0%Crown 31.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,448 USD|Low: $2,368 USD|High: $5,858 USD|Avg: $3,403 USD|-10.0%
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
Retailer 16
Retailer 17
November 5, 2026
Retailer 15$2,380 USD
Retailer 3$2,554 USD
Retailer 16$2,597 USD
Retailer 6$2,633 USD
Retailer 17$2,638 USD
Retailer 13$2,795 USD
Retailer 9$2,825 USD
Retailer 11$3,239 USD
Retailer 2$3,250 USD
Retailer 4$3,250 USD
Retailer 5$3,360 USD
Retailer 1$3,448 USD
Retailer 14$3,732 USD
Retailer 8$3,792 USD
Retailer 7$3,820 USD
Retailer 10$3,842 USD
Retailer 12$5,251 USD

30 data points across 17 retailers

20 retailers$2,380 USD to $5,251 USD

A
Cheapest Retailer
-
$2,380 USD
A
Retailer 2
-
$2,554 USD
View
A
Retailer 3
-
$2,597 USD
View
A
Retailer 4
-
$2,633 USD
View
Final sale: no returns
A
Retailer 5
-
$2,638 USD
View
A
Retailer 6
-
$2,795 USD
View
Retailer 7
-
$3,208 USD
View
Price last confirmed 36 days ago
A
Retailer 8
-
$3,239 USD
View
A
Retailer 9
-
$3,250 USD
View
B+
Retailer 10
-
$3,250 USD
View
Retailer 11
-
$3,331 USD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$3,360 USD
View
B+
Retailer 13
-
$3,448 USD
View
Retailer 14
-
$3,701 USD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$3,732 USD
View
Retailer 16
-
$3,792 USD
View
Price last confirmed 35 days ago
Retailer 17
-
$3,820 USD
View
Price last confirmed 14 days ago
B+
Retailer 18
-
$3,842 USD
View
B
Retailer 19
-
$5,251 USD
View
Most Expensive
NZ Jewellers
edd1479b-0c61-4ddb-aba2-9fc4530b17a1 · Sep 27
$6,169 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from $2,380 USDSave up to $2,871 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
1.00ct Round
$2,380 USD