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Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG816657809

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

Certificate IGI LG816657809

Diamond specifications and retailer prices

From HK$4,605 HKD
€559 EUR
As of October 31, 2026
Save HK$6,764 HKD (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$17,849 HKD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816657809 or 816657809. Listed at 9 retailers as of October 29, 2026, with a 147% 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

1.51
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle27.2°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816657809
Dimensions8.03 × 5.73 × 3.81 mm
L/W Ratio1.40
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
8.03 mm5.73 mm1.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816657809
Side View
Table 66.0%Crown 27.2°Girdle: Slightly ThickPavilion 35.6°Culet: NoneDepth 66.5%

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: Oct 31
Current: HK$17,849 HKD|Low: HK$3,805 HKD|High: HK$18,084 HKD|Avg: HK$7,995 HKD|+4.8%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 2HK$4,605 HKD
Retailer 5HK$4,637 HKD
Retailer 6HK$4,864 HKD
Retailer 3HK$4,993 HKD
Retailer 8HK$7,940 HKD
Retailer 7HK$8,669 HKD
Retailer 4HK$11,369 HKD
Rare CaratHK$17,849 HKD

43 data points across 8 retailers

9 retailersHK$4,605 HKD to HK$11,369 HKD

A
Cheapest Retailer
-
HK$4,605 HKD
€559 EUR
A
Retailer 2
-
HK$4,637 HKD
$591 USD
View
A
Retailer 3
-
HK$4,864 HKD
$620 USD
View
A
Retailer 4
-
HK$4,993 HKD
£501 GBP
View
B+
Retailer 5
-
HK$7,940 HKD
$1,012 USD
View
B+
Retailer 6
-
HK$8,850 HKD
$1,128 USD
View
B+
Retailer 7
-
HK$9,455 HKD
$1,205 USD
View
B+
Retailer 8
-
HK$11,369 HKD
£1,141 GBP
View
Most Expensive
Rare Carat
NV54-113A · Oct 18
HK$17,849 HKD
$2,275 USD
View
Price last confirmed 12 days ago
8 more retailers have this diamond
Prices start from HK$4,605 HKDSave up to HK$6,764 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
1.51ct Radiant
HK$4,605 HKD