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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG735580809

Shape and cutting style on the report: Cut cornered rectangular mixed cut

Certificate IGI LG735580809

Diamond specifications and retailer prices

From HK$2,299 HKD
As of November 4, 2026
Save HK$9,384 HKD (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$15,064 HKD at Rare Carat · As of September 28, 2026
View at Rare Carat

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 LG735580809 or 735580809. Listed at 20 retailers as of November 4, 2026, with a 408% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle25.5°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG735580809
Dimensions7.65 × 4.90 × 3.18 mm
L/W Ratio1.56
Culet sizeLong
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.65 mm4.90 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG735580809
Side View
Table 60.0%Crown 25.5°Girdle: MED-STKPavilion 33.4°Culet: LNGDepth 64.9%

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$15,064 HKD|Low: HK$2,205 HKD|High: HK$15,064 HKD|Avg: HK$5,883 HKD
Rare Carat
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
Retailer 15
November 4, 2026
Retailer 15HK$2,299 HKD
Retailer 7HK$2,573 HKD
Retailer 5HK$2,668 HKD
Retailer 3HK$2,848 HKD
Retailer 6HK$2,848 HKD
Retailer 14HK$3,962 HKD
Retailer 13HK$4,080 HKD
Retailer 11HK$4,590 HKD
Retailer 9HK$4,911 HKD
Retailer 2HK$4,990 HKD
Retailer 8HK$7,642 HKD
Retailer 4HK$9,156 HKD
Retailer 12HK$9,533 HKD
Retailer 10HK$11,416 HKD
Rare CaratHK$15,064 HKD

44 data points across 15 retailers

20 retailersHK$2,299 HKD to HK$11,682 HKD

A
Cheapest Retailer
-
HK$2,299 HKD
A
Retailer 2
-
HK$2,573 HKD
View
Final sale: no returns
A
Retailer 3
-
HK$2,668 HKD
View
Retailer 4
-
HK$2,848 HKD
View
Price last confirmed 10 days ago
A
Retailer 5
-
HK$2,848 HKD
View
A
Retailer 6
-
HK$3,962 HKD
View
A
Retailer 7
-
HK$4,080 HKD
View
A
Retailer 8
-
HK$4,590 HKD
View
A
Retailer 9
-
HK$4,911 HKD
View
A
Retailer 10
-
HK$4,911 HKD
View
A
Retailer 11
-
HK$4,990 HKD
View
B+
Retailer 12
-
HK$7,642 HKD
View
B
Retailer 13
-
HK$9,156 HKD
View
B+
Retailer 14
-
HK$9,533 HKD
View
B
Retailer 15
-
HK$9,533 HKD
View
B
Retailer 16
-
HK$10,506 HKD
View
B
Retailer 17
-
HK$11,117 HKD
View
B
Retailer 18
-
HK$11,416 HKD
View
B
Retailer 19
-
HK$11,682 HKD
View
Most Expensive
Rare Carat
91965A_l_735580809 · Sep 28
HK$15,064 HKD
$1,920 USD
View
Price last confirmed 37 days ago
19 more retailers have this diamond
Prices start from HK$2,299 HKDSave up to HK$9,384 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$2,299 HKD