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1.23ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 1538212314

Certificate GIA 1538212314

Diamond specifications and retailer prices

From $6,945 NZD
As of November 1, 2026
Save $4,697 NZD (40%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $11,642 NZD at Cape Diamonds · As of October 31, 2026
View at Cape Diamonds

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1538212314. Listed at 13 retailers as of October 31, 2026, with prices from $6,945 to $11,642, a $4,697 spread on the same certified stone. Cape Diamonds lists it at $11,642. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1538212314
Dimensions6.92 × 6.87 × 4.16 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Key to symbols
Crystal, Cloud, Needle
Top View
6.92 mm6.87 mm1.23 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1538212314
Side View
Table 59.0%Crown 32°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 60.3%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $11,642 NZD|Low: $6,600 NZD|High: $11,642 NZD|Avg: $9,043 NZD|+2.2%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 5$6,945 NZD
Retailer 6$7,921 NZD
Retailer 8$8,100 NZD
Retailer 9$8,826 NZD
Retailer 7$9,081 NZD
Retailer 3$9,393 NZD
Retailer 2$9,786 NZD
Retailer 4$10,412 NZD
Cape Diamonds$11,642 NZD

41 data points across 9 retailers

13 retailers$6,945 NZD to $11,642 NZD

B+
Cheapest Retailer
-
$6,945 NZD
B+
Retailer 2
-
$7,483 NZD
View
B+
Retailer 3
-
$8,100 NZD
View
B+
Retailer 4
-
$8,826 NZD
View
B
Retailer 5
-
$9,081 NZD
View
B
Retailer 6
-
$9,393 NZD
View
B
Retailer 7
-
$9,633 NZD
View
B
Retailer 8
-
$9,633 NZD
View
B
Retailer 9
-
$9,730 NZD
View
B
Retailer 10
-
$9,786 NZD
View
B
Retailer 11
-
$9,958 NZD
View
B
Retailer 12
-
$10,412 NZD
View
Most Expensive
B
Cape Diamonds
cert_1538212314 · Oct 31
$11,642 NZD
ZAR 104,263 ZAR
View
12 more retailers have this diamond
Prices start from $6,945 NZDSave up to $4,697 NZD

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
$6,945 NZD