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Round|Lab Grown|IGI

1.21ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG817652948

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817652948

Diamond specifications and retailer prices

From HK$1,789 HKD
As of November 4, 2026
Save HK$2,448 HKD (58%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$8,169 HKD at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817652948 or 817652948. Listed at 16 retailers as of November 4, 2026, with a 137% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817652948
Dimensions6.86 × 6.82 × 4.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.82 mm1.21 ctH / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG817652948
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.5%

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$2,322 HKD|Low: HK$1,185 HKD|High: HK$11,172 HKD|Avg: HK$4,277 HKD|-22.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 6, 2026
Retailer 10HK$1,185 HKD
Retailer 9HK$1,789 HKD
Retailer 4HK$2,048 HKD
Retailer 1HK$2,322 HKD
Retailer 7HK$3,028 HKD
Retailer 6HK$3,115 HKD
Retailer 5HK$3,217 HKD
Retailer 2HK$4,040 HKD
Retailer 8HK$4,236 HKD
Retailer 11HK$4,691 HKD
Retailer 3HK$6,959 HKD
Reve DiamondsHK$8,169 HKD

34 data points across 12 retailers

16 retailersHK$1,789 HKD to HK$4,236 HKD

Retailer 1
-
HK$1,436 HKD
Price last confirmed 27 days ago
Retailer 2
-
HK$1,671 HKD
View
Price last confirmed 28 days ago
Retailer 3
-
HK$1,781 HKD
View
Price last confirmed 27 days ago
B+
Retailer 4
-
HK$1,789 HKD
View
A
Retailer 5
-
HK$2,048 HKD
View
A
Retailer 6
-
HK$2,322 HKD
View
A
Retailer 7
-
HK$3,028 HKD
View
A
Retailer 8
-
HK$3,115 HKD
View
A
Retailer 9
-
HK$3,217 HKD
View
Retailer 10
-
HK$3,530 HKD
View
Price last confirmed 11 days ago
Retailer 11
-
HK$4,040 HKD
View
Price last confirmed 11 days ago
A
Retailer 12
-
HK$4,236 HKD
View
Retailer 13
-
HK$4,691 HKD
View
Price last confirmed 10 days ago
Retailer 14
-
HK$5,735 HKD
View
Price last confirmed 28 days ago
Retailer 15
-
HK$6,959 HKD
View
Price last confirmed 16 days ago
Most Expensive
Reve Diamonds
CA45F42F7 · Oct 25
HK$8,169 HKD
$1,041 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from HK$1,789 HKDSave up to HK$2,448 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$1,789 HKD