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Radiant|Lab Grown|IGI

1.51ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG654418105

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

Certificate IGI LG654418105

Diamond specifications and retailer prices

From HK$3,287 HKD
$419 USD
As of October 30, 2026
Save HK$11,965 HKD (78%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: HK$18,320 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 LG654418105 or 654418105. Listed at 25 retailers as of October 30, 2026, with a 364% 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654418105
Dimensions8.05 × 5.68 × 3.83 mm
L/W Ratio1.42
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
8.05 mm5.68 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654418105
Side View
Table 66.0%Crown 40.5°Girdle: MediumPavilion 33.9°Culet: NoneDepth 67.4%

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 30
Current: HK$18,320 HKD|Low: HK$3,154 HKD|High: HK$18,594 HKD|Avg: HK$8,542 HKD|-1.5%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 19HK$3,287 HKD
Retailer 6HK$3,680 HKD
Retailer 10HK$3,680 HKD
Retailer 4HK$4,072 HKD
Retailer 7HK$4,072 HKD
Retailer 17HK$5,217 HKD
Retailer 9HK$5,963 HKD
Retailer 13HK$6,426 HKD
Retailer 12HK$6,712 HKD
Retailer 2HK$6,772 HKD
Retailer 16HK$7,003 HKD
Retailer 14HK$9,491 HKD
Retailer 18HK$11,431 HKD
Retailer 11HK$11,837 HKD
Retailer 8HK$12,959 HKD
Retailer 5HK$13,102 HKD
Retailer 3HK$14,923 HKD
Retailer 15HK$15,046 HKD
Rare CaratHK$18,320 HKD

44 data points across 19 retailers

25 retailersHK$3,287 HKD to HK$15,252 HKD

A
Cheapest Retailer
-
HK$3,287 HKD
$419 USD
A
Retailer 2
-
HK$3,680 HKD
$469 USD
View
Final sale: no returns
A
Retailer 3
-
HK$3,680 HKD
$469 USD
View
A
Retailer 4
-
HK$4,072 HKD
$519 USD
View
A
Retailer 5
-
HK$4,072 HKD
$519 USD
View
A
Retailer 6
-
HK$4,519 HKD
View
A
Retailer 7
-
HK$5,217 HKD
$665 USD
View
A
Retailer 8
-
HK$5,963 HKD
$760 USD
View
A
Retailer 9
-
HK$6,426 HKD
$819 USD
View
A
Retailer 10
-
HK$6,712 HKD
£674 GBP
View
A
Retailer 11
-
HK$6,772 HKD
€822 EUR
View
A
Retailer 12
-
HK$7,003 HKD
ZAR 14,419 ZAR
View
B+
Retailer 13
-
HK$8,301 HKD
$1,058 USD
View
B+
Retailer 14
-
HK$9,491 HKD
A$1,861 AUD
View
B+
Retailer 15
-
HK$10,567 HKD
£1,061 GBP
View
B+
Retailer 16
-
HK$11,431 HKD
$1,457 USD
View
B+
Retailer 17
-
HK$11,837 HKD
£1,188 GBP
View
B+
Retailer 18
-
HK$12,959 HKD
SGD 2,232 SGD
View
B+
Retailer 19
-
HK$13,102 HKD
$1,670 USD
View
B
Retailer 20
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HK$13,364 HKD
$1,703 USD
View
B
Retailer 21
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HK$14,844 HKD
$1,892 USD
View
B
Retailer 22
-
HK$14,923 HKD
$1,902 USD
View
B+
Retailer 23
-
HK$15,046 HKD
£1,510 GBP
View
B
Retailer 24
-
HK$15,252 HKD
$1,944 USD
View
Most Expensive
Rare Carat
197B56-7A · Oct 18
HK$18,320 HKD
$2,335 USD
View
Price last confirmed 13 days ago
24 more retailers have this diamond
Prices start from HK$3,287 HKDSave up to HK$11,965 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$3,287 HKD