Round|Natural|GIA

1.09ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2554894009

Certificate GIA 2554894009

Diamond specifications and retailer prices

From $2,716 USD
As of October 30, 2026
Save $3,117 USD (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,833 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.09ct natural round diamond

This 1.09ct 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 2554894009. Listed at 17 retailers as of October 30, 2026, with prices from $2,716 to $5,833, a $3,117 spread on the same certified stone. NZ Jewellers lists it at $5,833. 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

1.09
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2554894009
Dimensions6.51 × 6.56 × 4.09 mm
L/W Ratio1.01
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
6.51 mm6.56 mm1.09 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2554894009
Side View
Table 59.0%Crown 36°Girdle: Medium to Slightly ThickPavilion 41°Culet: NoneDepth 62.6%

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: Oct 30
Current: $5,833 USD|Low: $2,495 USD|High: $5,833 USD|Avg: $3,372 USD
NZ Jewellers
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 1, 2026
Retailer 5$2,716 USD
Retailer 15$2,720 USD
Retailer 10$2,775 USD
Retailer 17$2,850 USD
Retailer 7$3,033 USD
Retailer 16$3,033 USD
Retailer 8$3,115 USD
Retailer 6$3,150 USD
Retailer 11$3,222 USD
Retailer 9$3,351 USD
Retailer 13$3,449 USD
Retailer 3$3,500 USD
Retailer 2$3,674 USD
Retailer 4$3,883 USD
Retailer 14$4,116 USD
Retailer 12$5,599 USD
NZ Jewellers$5,833 USD

34 data points across 17 retailers

17 retailers$2,716 USD to $5,833 USD

B+
Cheapest Retailer
-
$2,716 USD
A
Retailer 2
-
$2,720 USD
View
B+
Retailer 3
-
$2,775 USD
View
B+
Retailer 4
-
$2,850 USD
View
B+
Retailer 5
-
$3,033 USD
View
B+
Retailer 6
-
$3,033 USD
View
B+
Retailer 7
-
$3,115 USD
View
B+
Retailer 8
-
$3,150 USD
View
B+
Retailer 9
-
$3,222 USD
£2,537 GBP
View
Retailer 10
-
$3,351 USD
A$5,155 AUD
View
Price last confirmed 24 days ago
B
Retailer 11
-
$3,449 USD
£2,716 GBP
View
B
Retailer 12
-
$3,500 USD
View
B
Retailer 13
-
$3,674 USD
€3,499 EUR
View
Retailer 14
-
$3,883 USD
View
Price last confirmed 9 days ago
B
Retailer 15
-
$4,116 USD
ZAR 66,489 ZAR
View
B
Retailer 16
-
$5,599 USD
£4,409 GBP
View
Most Expensive
B
NZ Jewellers
8d2ec18a-a645-43c3-a3ed-79e9b2be2628 · Oct 30
$5,833 USD
View
16 more retailers have this diamond
Prices start from $2,716 USDSave up to $3,117 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
1.09ct Round
$2,716 USD