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Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1565135099

Certificate GIA 1565135099

Diamond specifications and retailer prices

From HK$30,361 HKD
As of November 5, 2026
Save HK$5,092 HKD (14%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$54,775 HKD 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 October 30, 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: HK$54,775 HKD|Low: HK$29,969 HKD|High: HK$55,042 HKD|Avg: HK$37,228 HKD|-0.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 4HK$29,969 HKD
Retailer 9HK$30,361 HKD
Retailer 3HK$30,416 HKD
Retailer 6HK$31,444 HKD
Retailer 7HK$31,444 HKD
Retailer 8HK$33,711 HKD
Retailer 2HK$35,452 HKD
Retailer 5HK$52,641 HKD
NZ JewellersHK$54,775 HKD

28 data points across 9 retailers

9 retailersHK$30,361 HKD to HK$35,452 HKD

Retailer 1
-
HK$29,969 HKD
Price last confirmed 9 days ago
B+
Retailer 2
-
HK$30,361 HKD
View
Retailer 3
-
HK$30,416 HKD
View
Price last confirmed 9 days ago
Retailer 4
-
HK$31,444 HKD
View
Price last confirmed 11 days ago
Retailer 5
-
HK$31,444 HKD
View
Price last confirmed 12 days ago
Retailer 6
-
HK$33,711 HKD
View
Price last confirmed 33 days ago
B+
Retailer 7
-
HK$35,452 HKD
View
Retailer 8
-
HK$52,641 HKD
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
f2159c02-59d5-4fbc-86aa-12c7fd592421 · Oct 27
HK$54,775 HKD
$6,982 USD
View
Price last confirmed 10 days ago
8 more retailers have this diamond
Prices start from HK$30,361 HKDSave up to HK$5,092 HKD

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
HK$30,361 HKD