CaratHunter
Plans
Round|Lab Grown|GIA

1.21ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • GIA 2497979319

Shape and cutting style on the report: Round

Certificate GIA 2497979319

Diamond specifications and retailer prices

From HK$3,130 HKD
As of November 5, 2026
Save HK$5,421 HKD (63%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$8,551 HKD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown 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 2497979319. Listed at 6 retailers as of November 5, 2026, with prices from HK$3,130 to HK$8,551, a HK$5,421 spread on the same certified stone. Brilliant Earth lists it at HK$8,551. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginLab Grown
Grading LabGIA
CertificateGIA 2497979319
Dimensions6.86 × 6.89 × 4.22 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.86 mm6.89 mm1.21 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2497979319
Side View
Table 59.0%Crown 34°Girdle: MediumPavilion 41.4°Culet: NoneDepth 61.4%

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 5
Current: HK$8,551 HKD|Low: HK$3,075 HKD|High: HK$15,588 HKD|Avg: HK$8,115 HKD|-4.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8HK$3,130 HKD
Retailer 7HK$4,715 HKD
Retailer 6HK$5,154 HKD
Retailer 2HK$5,774 HKD
Retailer 5HK$6,056 HKD
Retailer 3HK$8,237 HKD
Retailer 11HK$8,237 HKD
Brilliant EarthHK$8,551 HKD
Retailer 4HK$8,700 HKD
Retailer 10HK$10,356 HKD
Retailer 9HK$13,188 HKD
Retailer 12HK$15,588 HKD

24 data points across 12 retailers

6 retailersHK$3,130 HKD to HK$8,551 HKD

A
Cheapest Retailer
-
HK$3,130 HKD
B+
Retailer 2
-
HK$4,715 HKD
View
B
Retailer 3
-
HK$5,154 HKD
View
B
Retailer 4
-
HK$5,774 HKD
View
B
Retailer 5
-
HK$6,056 HKD
View
Most Expensive
B
Brilliant Earth
11210145A · Nov 5
HK$8,551 HKD
$1,090 USD
View
5 more retailers have this diamond
Prices start from HK$3,130 HKDSave up to HK$5,421 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$3,130 HKD