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Round|Natural|GIA

1.05ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2556452598

Certificate GIA 2556452598

Diamond specifications and retailer prices

From $1,728 USD
As of November 6, 2026
Save $2,291 USD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,950 USD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.05ct natural round diamond

This 1.05ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556452598. Listed at 20 retailers as of November 2, 2026, with a 133% 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

1.05
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556452598
Dimensions6.46 × 6.50 × 4.06 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.46 mm6.50 mm1.05 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556452598
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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 6
Current: $2,394 USD|Low: $1,728 USD|High: $4,197 USD|Avg: $2,431 USD|-1.0%
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
November 6, 2026
Retailer 16$1,728 USD
Retailer 5$1,759 USD
Retailer 4$1,909 USD
Retailer 11$1,967 USD
Retailer 15$1,968 USD
Retailer 2$2,093 USD
Retailer 13$2,117 USD
Retailer 6$2,267 USD
Retailer 8$2,319 USD
Retailer 1$2,394 USD
Retailer 9$2,503 USD
Retailer 10$2,635 USD
Retailer 7$2,675 USD
Retailer 14$2,701 USD
Retailer 12$3,329 USD
Retailer 3$4,019 USD

30 data points across 16 retailers

20 retailers$1,728 USD to $4,019 USD

A
Cheapest Retailer
-
$1,728 USD
Retailer 2
-
$1,759 USD
View
Price last confirmed 17 days ago
Retailer 3
-
$1,909 USD
View
Price last confirmed 11 days ago
A
Retailer 4
-
$1,967 USD
View
A
Retailer 5
-
$1,968 USD
View
A
Retailer 6
-
$2,093 USD
View
A
Retailer 7
-
$2,117 USD
View
Final sale: no returns
Retailer 8
-
$2,319 USD
View
Price last confirmed 17 days ago
A
Retailer 9
-
$2,345 USD
View
A
Retailer 10
-
$2,394 USD
View
Retailer 11
-
$2,477 USD
View
Price last confirmed 22 days ago
B+
Retailer 12
-
$2,503 USD
View
B+
Retailer 13
-
$2,635 USD
View
Retailer 14
-
$2,675 USD
View
Price last confirmed 19 days ago
B+
Retailer 15
-
$2,701 USD
View
Retailer 16
-
$2,732 USD
View
Price last confirmed 48 days ago
B+
Retailer 17
-
$3,329 USD
View
B
Retailer 18
-
$4,019 USD
View
Retailer 19
-
$4,950 USD
View
Price last confirmed 20 days ago
Most Expensive
NZ Jewellers
05f53ec0-77c7-4a2a-a7d4-89ef61e356d8 · Sep 19
$4,950 USD
View
Price last confirmed 47 days ago
19 more retailers have this diamond
Prices start from $1,728 USDSave up to $2,291 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
1.05ct Round
$1,728 USD