Round|Natural|GIA

1.11ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6551090389

Certificate GIA 6551090389

Diamond specifications and retailer prices

From $2,187 USD
As of October 30, 2026
Save $2,166 USD (50%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,279 USD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.11ct natural round diamond

This 1.11ct 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 6551090389. Listed at 13 retailers as of October 26, 2026, with a 99% 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

1.11
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551090389
Dimensions6.63 × 6.59 × 4.11 mm
L/W Ratio1.01
Star length50%
Top View
6.63 mm6.59 mm1.11 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551090389
Side View
Table 59.0%Crown 34.5°GirdlePavilion 41.6°Culet: NoneDepth 62.2%

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: $2,823 USD|Low: $2,136 USD|High: $4,478 USD|Avg: $2,864 USD|+2.3%
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
November 1, 2026
Retailer 10$2,187 USD
Retailer 8$2,213 USD
Retailer 5$2,430 USD
Retailer 3$2,525 USD
Retailer 13$2,660 USD
Retailer 4$2,700 USD
Retailer 7$2,750 USD
Retailer 9$2,802 USD
Retailer 1$2,823 USD
Retailer 12$2,826 USD
Retailer 2$3,045 USD
Retailer 6$4,201 USD
Retailer 11$4,353 USD

34 data points across 13 retailers

13 retailers$2,187 USD to $4,353 USD

A
Cheapest Retailer
-
$2,187 USD
A
Retailer 2
-
$2,213 USD
View
Final sale: no returns
Retailer 3
-
$2,525 USD
View
Price last confirmed 31 days ago
Retailer 4
-
$2,642 USD
View
Price last confirmed 33 days ago
B+
Retailer 5
-
$2,750 USD
£2,165 GBP
View
B+
Retailer 6
-
$2,802 USD
View
B+
Retailer 7
-
$2,823 USD
€2,689 EUR
View
Retailer 8
-
$2,826 USD
A$4,348 AUD
View
Price last confirmed 25 days ago
Retailer 9
-
$2,914 USD
View
Price last confirmed 33 days ago
Retailer 10
-
$3,045 USD
ZAR 49,189 ZAR
View
Price last confirmed 32 days ago
B
Retailer 11
-
$4,201 USD
£3,308 GBP
View
B
Retailer 12
-
$4,353 USD
View
Most Expensive
NZ Jewellers
1166df7e-5052-447d-9f7d-2b3dbc4e60db · Sep 28
$5,279 USD
View
Price last confirmed 34 days ago
12 more retailers have this diamond
Prices start from $2,187 USDSave up to $2,166 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
1.11ct Round
$2,187 USD