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Round|Natural|GIA

1.21ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2556636452

Certificate GIA 2556636452

Diamond specifications and retailer prices

From HK$10,607 HKD
As of November 4, 2026
Save HK$17,314 HKD (62%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$27,921 HKD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556636452. Listed at 11 retailers as of November 4, 2026, with prices from HK$10,607 to HK$27,921, a HK$17,314 spread on the same certified stone. NZ Jewellers lists it at HK$27,921. 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

1.21
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556636452
Dimensions6.93 × 6.88 × 4.13 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp
Top View
6.93 mm6.88 mm1.21 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556636452
Side View
Table 59.0%Crown 31.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 59.8%

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: Nov 4
Current: HK$27,921 HKD|Low: HK$10,607 HKD|High: HK$28,517 HKD|Avg: HK$13,770 HKD|-2.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6HK$10,607 HKD
Retailer 2HK$11,250 HKD
Retailer 11HK$11,321 HKD
Retailer 7HK$11,446 HKD
Retailer 9HK$11,446 HKD
Retailer 8HK$11,972 HKD
Retailer 10HK$12,199 HKD
Retailer 3HK$13,211 HKD
Retailer 5HK$13,964 HKD
Retailer 4HK$15,800 HKD
NZ JewellersHK$27,921 HKD

43 data points across 11 retailers

11 retailersHK$10,607 HKD to HK$27,921 HKD

A
Cheapest Retailer
-
HK$10,607 HKD
A
Retailer 2
-
HK$11,250 HKD
View
A
Retailer 3
-
HK$11,321 HKD
View
Retailer 4
-
HK$11,446 HKD
View
Price last confirmed 8 days ago
A
Retailer 5
-
HK$11,446 HKD
View
A
Retailer 6
-
HK$11,972 HKD
View
A
Retailer 7
-
HK$12,199 HKD
View
B+
Retailer 8
-
HK$13,211 HKD
View
B+
Retailer 9
-
HK$13,964 HKD
View
B+
Retailer 10
-
HK$15,800 HKD
View
Most Expensive
B
NZ Jewellers
ae8f5be1-e745-4e7b-8d9d-eb4b15a6ff4c · Nov 5
HK$27,921 HKD
$3,559 USD
View
10 more retailers have this diamond
Prices start from HK$10,607 HKDSave up to HK$17,314 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.

A
1.21ct Round
HK$10,607 HKD