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Round|Natural|GIA

1.23ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2564026489

Certificate GIA 2564026489

Diamond specifications and retailer prices

From $1,715 USD
HK$13,400 HKD
As of October 30, 2026
Save $763 USD (31%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,478 USD at Michael Trio · As of October 27, 2026
View at Michael Trio

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 2564026489. Listed at 6 retailers as of October 27, 2026, with prices from $1,715 to $2,478, a $763 spread on the same certified stone. Michael Trio lists it at $2,478. 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
FluorescenceStrong
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2564026489
Dimensions6.89 × 6.91 × 4.18 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal
Top View
6.89 mm6.91 mm1.23 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2564026489
Side View
Table 59.0%Crown 33.5°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 60.6%

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: $2,478 USD|Low: $1,715 USD|High: $2,581 USD|Avg: $2,269 USD|-4.0%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 2$1,715 USD
Retailer 6$2,115 USD
Retailer 4$2,166 USD
Retailer 3$2,200 USD
Retailer 7$2,348 USD
Retailer 5$2,400 USD
Michael Trio$2,478 USD

16 data points across 7 retailers

6 retailers$1,715 USD to $2,478 USD

A
Cheapest Retailer
-
$1,715 USD
HK$13,400 HKD
A
Retailer 2
-
$2,115 USD
View
B+
Retailer 3
-
$2,166 USD
View
Final sale: no returns
A
Retailer 4
-
$2,200 USD
SGD 2,973 SGD
View
A
Retailer 5
-
$2,400 USD
View
Most Expensive
B+
Michael Trio
2508674780 · Oct 27
$2,478 USD
SGD 3,349 SGD
View
5 more retailers have this diamond
Prices start from $1,715 USDSave up to $763 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
$1,715 USD