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Round|Natural|GIA

1.23ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6552654575

Certificate GIA 6552654575

Diamond specifications and retailer prices

From $2,930 USD
A$4,507 AUD
As of October 30, 2026
Save $1,014 USD (26%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $3,943 USD at 77 Diamonds · As of October 31, 2026
View at 77 Diamonds

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6552654575. Listed at 5 retailers as of October 30, 2026, with prices from $2,930 to $3,943, a $1,014 spread on the same certified stone. 77 Diamonds lists it at $3,943. 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
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6552654575
Dimensions6.83 × 4.26 × 4.26 mm
L/W Ratio1.60
Culet sizeNone
Top View
6.83 mm4.26 mm1.23 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552654575
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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: $3,943 USD|Low: $2,310 USD|High: $4,134 USD|Avg: $3,138 USD|+50.7%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 8$2,310 USD
Retailer 7$2,368 USD
Retailer 11$2,531 USD
Retailer 9$2,747 USD
Retailer 6$3,165 USD
Retailer 5$3,181 USD
Retailer 3$3,190 USD
Retailer 4$3,250 USD
Retailer 2$3,868 USD
77 Diamonds$3,943 USD
Retailer 10$4,098 USD

22 data points across 11 retailers

5 retailers$2,930 USD to $3,943 USD

A
Cheapest Retailer
-
$2,930 USD
A$4,507 AUD
B+
Retailer 2
-
$3,022 USD
View
B+
Retailer 3
-
$3,250 USD
CA$4,514 CAD
View
B
Retailer 4
-
$3,868 USD
€3,684 EUR
View
Most Expensive
B
77 Diamonds
RBMBE2RGKPUG · Oct 31
$3,943 USD
£3,105 GBP
View
4 more retailers have this diamond
Prices start from $2,930 USDSave up to $1,014 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
1.23ct Round
$2,930 USD