Round|Natural|HRD

1.09ct I SI1 Round Natural Diamond

EX • I/SI1 • HRD 250000054318

Certificate HRD 250000054318

Diamond specifications and retailer prices

From $1,749 USD
₹166,599 INR
As of October 31, 2026
Save $2,042 USD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,523 USD at NZ Jewellers · As of September 28, 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 HRD 250000054318. Listed at 15 retailers as of October 31, 2026, with a 117% 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

1.09
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle41.6°
OriginNatural
Grading LabHRD
CertificateHRD 250000054318
Dimensions6.59 × 6.55 × 4.13 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.59 mm6.55 mm1.09 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 250000054318
Side View
Table 57.0%Crown 34.6°Girdle: MediumPavilion 41.6°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 31
Current: $3,791 USD|Low: $1,745 USD|High: $3,837 USD|Avg: $2,453 USD|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 3$1,749 USD
Retailer 7$1,997 USD
Retailer 6$2,019 USD
Retailer 5$2,061 USD
Retailer 2$2,388 USD
Retailer 4$2,702 USD
Retailer 1$3,791 USD

40 data points across 7 retailers

15 retailers$1,749 USD to $3,791 USD

A
Cheapest Retailer
-
$1,749 USD
₹166,599 INR
A
Retailer 2
-
$1,997 USD
View
Final sale: no returns
A
Retailer 3
-
$2,019 USD
SGD 2,729 SGD
View
A
Retailer 4
-
$2,061 USD
View
A
Retailer 5
-
$2,069 USD
View
A
Retailer 6
-
$2,150 USD
View
Retailer 7
-
$2,164 USD
View
Price last confirmed 24 days ago
Retailer 8
-
$2,164 USD
View
Price last confirmed 20 days ago
Retailer 9
-
$2,263 USD
View
Price last confirmed 32 days ago
A
Retailer 10
-
$2,302 USD
View
A
Retailer 11
-
$2,388 USD
£1,880 GBP
View
Retailer 12
-
$2,496 USD
View
Price last confirmed 23 days ago
B+
Retailer 13
-
$2,702 USD
€2,573 EUR
View
B
Retailer 14
-
$3,791 USD
£2,985 GBP
View
Most Expensive
NZ Jewellers
374e3cf0-ab08-4bbe-a6dd-09f9858eb3b1 · Sep 28
$4,523 USD
View
Price last confirmed 34 days ago
14 more retailers have this diamond
Prices start from $1,749 USDSave up to $2,042 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
$1,749 USD