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Radiant|Lab Grown|IGI

1.21ct E IF Radiant Lab Grown Diamond

VG • E/IF • IGI LG840640263

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

Certificate IGI LG840640263

Diamond specifications and retailer prices

From HK$2,236 HKD
$285 USD
As of October 31, 2026
Save HK$16,044 HKD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$18,280 HKD at Brilliant Earth · As of October 31, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG840640263 or 840640263. Listed at 15 retailers as of October 31, 2026, with prices from HK$2,236 to HK$18,280, a HK$16,044 spread on the same certified stone. Brilliant Earth lists it at HK$18,280. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.5°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840640263
Dimensions7.23 × 5.19 × 3.53 mm
L/W Ratio1.39
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
7.23 mm5.19 mm1.21 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840640263
Side View
Table 61.0%Crown 48.5°Girdle: STK-THKPavilion 34.4°Culet: NoneDepth 68.0%

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: Oct 31
Current: HK$9,565 HKD|Low: HK$2,236 HKD|High: HK$10,680 HKD|Avg: HK$5,991 HKD|-3.7%
Retailer 1
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 1, 2026
Retailer 10HK$2,236 HKD
Retailer 7HK$2,523 HKD
Retailer 14HK$2,573 HKD
Retailer 9HK$3,864 HKD
Retailer 13HK$4,009 HKD
Retailer 8HK$4,494 HKD
Retailer 6HK$4,707 HKD
Retailer 5HK$6,038 HKD
Retailer 12HK$6,151 HKD
Retailer 11HK$7,697 HKD
Retailer 4HK$8,078 HKD
Retailer 3HK$8,078 HKD
Retailer 1HK$9,565 HKD
Retailer 2HK$10,499 HKD

25 data points across 14 retailers

15 retailersHK$2,236 HKD to HK$18,280 HKD

A
Cheapest Retailer
-
HK$2,236 HKD
$285 USD
A
Retailer 2
-
HK$2,523 HKD
£253 GBP
View
A
Retailer 3
-
HK$2,573 HKD
$328 USD
View
Final sale: no returns
A
Retailer 4
-
HK$3,864 HKD
€469 EUR
View
A
Retailer 5
-
HK$4,009 HKD
$511 USD
View
A
Retailer 6
-
HK$4,494 HKD
£451 GBP
View
Retailer 7
-
HK$4,707 HKD
$600 USD
View
Price last confirmed 5 days ago
Retailer 8
-
HK$6,038 HKD
A$1,184 AUD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
HK$6,151 HKD
$784 USD
View
B
Retailer 10
-
HK$7,697 HKD
$981 USD
View
B+
Retailer 11
-
HK$8,078 HKD
A$1,584 AUD
View
B+
Retailer 12
-
HK$8,078 HKD
$1,030 USD
View
B
Retailer 13
-
HK$9,565 HKD
£960 GBP
View
B
Retailer 14
-
HK$10,499 HKD
$1,338 USD
View
Most Expensive
B
Brilliant Earth
22340637A · Oct 31
HK$18,280 HKD
$2,330 USD
View
14 more retailers have this diamond
Prices start from HK$2,236 HKDSave up to HK$16,044 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$2,236 HKD