Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 5506549779

Certificate GIA 5506549779

Diamond specifications and retailer prices

From $4,661 USD
As of November 4, 2026
Save $4,279 USD (48%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,940 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5506549779. Listed at 16 retailers as of November 4, 2026, with prices from $4,661 to $8,940, a $4,279 spread on the same certified stone. NZ Jewellers lists it at $8,940. 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

1.23
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5506549779
Dimensions6.86 × 6.80 × 4.31 mm
L/W Ratio1.01
Top View
6.86 mm6.80 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5506549779
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $5,682 USD|Low: $4,661 USD|High: $8,408 USD|Avg: $5,722 USD|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 6$4,661 USD
Retailer 7$4,934 USD
Retailer 3$4,988 USD
Retailer 4$5,130 USD
Retailer 9$5,345 USD
Retailer 8$5,388 USD
Retailer 1$5,682 USD
Retailer 2$6,521 USD
Retailer 5$8,286 USD

38 data points across 9 retailers

16 retailers$4,661 USD to $8,940 USD

B+
Cheapest Retailer
-
$4,661 USD
B+
Retailer 2
-
$4,934 USD
View
Final sale: no returns
B+
Retailer 3
-
$4,988 USD
View
B+
Retailer 4
-
$5,010 USD
View
B+
Retailer 5
-
$5,130 USD
View
B+
Retailer 6
-
$5,345 USD
View
Retailer 7
-
$5,345 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$5,345 USD
View
Retailer 9
-
$5,388 USD
View
Price last confirmed 28 days ago
B+
Retailer 10
-
$5,498 USD
View
B+
Retailer 11
-
$5,682 USD
View
B
Retailer 12
-
$6,168 USD
View
B
Retailer 13
-
$6,521 USD
View
B
Retailer 14
-
$8,286 USD
View
B
Retailer 15
-
$8,836 USD
View
Most Expensive
B
NZ Jewellers
1b6d518d-5cca-4551-b172-f30750849a94 · Nov 5
$8,940 USD
View
15 more retailers have this diamond
Prices start from $4,661 USDSave up to $4,279 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.

B+
1.23ct Round
$4,661 USD