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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG743538298

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG743538298

Diamond specifications and retailer prices

From HK$1,836 HKD
As of November 4, 2026
Save HK$12,993 HKD (88%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: HK$14,829 HKD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG743538298 or 743538298. Listed at 29 retailers as of November 4, 2026, with prices from HK$1,836 to HK$14,829, a HK$12,993 spread on the same certified stone. Brilliant Earth lists it at HK$14,829. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.1°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743538298
Dimensions7.89 × 5.27 × 3.40 mm
L/W Ratio1.50
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.89 mm5.27 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743538298
Side View
Table 62.0%Crown 41.1°Girdle: MediumPavilion 32.6°Culet: NoneDepth 64.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$14,829 HKD|Low: HK$1,836 HKD|High: HK$18,751 HKD|Avg: HK$6,480 HKD|-20.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 4, 2026
Retailer 14HK$1,836 HKD
Retailer 11HK$2,040 HKD
Retailer 4HK$3,217 HKD
Retailer 10HK$3,813 HKD
Retailer 8HK$3,923 HKD
Retailer 5HK$4,150 HKD
Retailer 2HK$4,245 HKD
Retailer 7HK$5,563 HKD
Retailer 6HK$5,986 HKD
Retailer 13HK$7,336 HKD
Retailer 9HK$9,101 HKD
Retailer 3HK$9,305 HKD
Retailer 12HK$14,554 HKD
Brilliant EarthHK$14,829 HKD

44 data points across 14 retailers

29 retailersHK$1,836 HKD to HK$14,829 HKD

A
Cheapest Retailer
-
HK$1,836 HKD
Retailer 2
-
HK$1,836 HKD
View
Price last confirmed 27 days ago
Retailer 3
-
HK$1,836 HKD
View
Price last confirmed 35 days ago
A
Retailer 4
-
HK$2,040 HKD
View
Final sale: no returns
Retailer 5
-
HK$2,126 HKD
View
Price last confirmed 38 days ago
Retailer 6
-
HK$2,244 HKD
View
Price last confirmed 38 days ago
Retailer 7
-
HK$2,244 HKD
View
Price last confirmed 35 days ago
Retailer 8
-
HK$2,275 HKD
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Price last confirmed 32 days ago
A
Retailer 9
-
HK$2,707 HKD
View
A
Retailer 10
-
HK$3,217 HKD
View
A
Retailer 11
-
HK$3,813 HKD
View
A
Retailer 12
-
HK$3,923 HKD
View
A
Retailer 13
-
HK$4,150 HKD
View
A
Retailer 14
-
HK$4,245 HKD
View
A
Retailer 15
-
HK$4,966 HKD
View
A
Retailer 16
-
HK$5,563 HKD
View
B+
Retailer 17
-
HK$5,986 HKD
View
B+
Retailer 18
-
HK$7,304 HKD
View
Retailer 19
-
HK$7,304 HKD
View
Price last confirmed 35 days ago
Retailer 20
-
HK$7,304 HKD
View
Price last confirmed 25 days ago
B+
Retailer 21
-
HK$7,336 HKD
View
B+
Retailer 22
-
HK$7,705 HKD
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B+
Retailer 23
-
HK$7,712 HKD
View
B+
Retailer 24
-
HK$8,340 HKD
View
B+
Retailer 25
-
HK$9,101 HKD
View
Retailer 26
-
HK$9,305 HKD
View
Price last confirmed 27 days ago
B
Retailer 27
-
HK$10,200 HKD
View
Retailer 28
-
HK$14,554 HKD
View
Price last confirmed 17 days ago
Most Expensive
B
Brilliant Earth
16656546A · Nov 4
HK$14,829 HKD
$1,890 USD
View
28 more retailers have this diamond
Prices start from HK$1,836 HKDSave up to HK$12,993 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 Radiant
HK$1,836 HKD