Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1565135099

Certificate GIA 1565135099

Diamond specifications and retailer prices

From $6,884 NZD
As of November 5, 2026
Save $1,155 NZD (14%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $12,420 NZD at NZ Jewellers · As of October 27, 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 1565135099. Listed at 9 retailers as of November 5, 2026, with a relatively tight 17% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1565135099
Dimensions6.78 × 6.83 × 4.24 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Crystal, Feather
Top View
6.78 mm6.83 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1565135099
Side View
Table 59.0%Crown 36°GirdlePavilion 41°CuletDepth 62.3%

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 5
Current: $12,420 NZD|Low: $6,795 NZD|High: $12,481 NZD|Avg: $8,437 NZD|-0.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4$6,795 NZD
Retailer 9$6,884 NZD
Retailer 3$6,897 NZD
Retailer 6$7,130 NZD
Retailer 7$7,130 NZD
Retailer 8$7,644 NZD
Retailer 2$8,039 NZD
Retailer 5$11,936 NZD
NZ Jewellers$12,420 NZD

29 data points across 9 retailers

9 retailers$6,884 NZD to $8,039 NZD

Retailer 1
-
$6,795 NZD
Price last confirmed 9 days ago
B+
Retailer 2
-
$6,884 NZD
View
Retailer 3
-
$6,897 NZD
View
Price last confirmed 9 days ago
Retailer 4
-
$7,130 NZD
View
Price last confirmed 11 days ago
Retailer 5
-
$7,130 NZD
View
Price last confirmed 12 days ago
Retailer 6
-
$7,644 NZD
View
Price last confirmed 33 days ago
B+
Retailer 7
-
$8,039 NZD
View
Retailer 8
-
$11,936 NZD
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
f2159c02-59d5-4fbc-86aa-12c7fd592421 · Oct 27
$12,420 NZD
$6,982 USD
View
Price last confirmed 10 days ago
8 more retailers have this diamond
Prices start from $6,884 NZDSave up to $1,155 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
$6,884 NZD