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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG816683635

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816683635

Diamond specifications and retailer prices

From HK$3,099 HKD
$395 USD
As of October 30, 2026
Save HK$16,044 HKD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$19,144 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion 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 LG816683635 or 816683635. Listed at 19 retailers as of October 30, 2026, with prices from HK$3,099 to HK$19,144, a HK$16,044 spread on the same certified stone. Brilliant Earth lists it at HK$19,144. 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 angle32.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816683635
Dimensions8.09 × 5.81 × 3.84 mm
L/W Ratio1.39
Girdle conditionFaceted
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
8.09 mm5.81 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816683635
Side View
Table 57.0%Crown 32.7°Girdle: STK-THKPavilion 33.9°Culet: NoneDepth 66.1%

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$19,144 HKD|Low: HK$3,099 HKD|High: HK$27,303 HKD|Avg: HK$9,317 HKD|-29.9%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 5HK$3,099 HKD
Retailer 6HK$3,436 HKD
Retailer 2HK$3,535 HKD
Retailer 15HK$4,629 HKD
Retailer 11HK$5,374 HKD
Retailer 8HK$5,429 HKD
Retailer 13HK$5,454 HKD
Retailer 17HK$5,900 HKD
Retailer 12HK$6,178 HKD
Retailer 16HK$7,971 HKD
Retailer 7HK$8,112 HKD
Retailer 9HK$11,363 HKD
Retailer 14HK$12,122 HKD
Retailer 10HK$12,173 HKD
Retailer 3HK$12,726 HKD
Retailer 19HK$13,194 HKD
Retailer 4HK$13,491 HKD
Retailer 18HK$18,359 HKD
Brilliant EarthHK$19,144 HKD

37 data points across 19 retailers

19 retailersHK$3,099 HKD to HK$19,144 HKD

A
Cheapest Retailer
-
HK$3,099 HKD
$395 USD
Final sale: no returns
A
Retailer 2
-
HK$3,436 HKD
$438 USD
View
A
Retailer 3
-
HK$3,535 HKD
£355 GBP
View
A
Retailer 4
-
HK$4,629 HKD
$590 USD
View
A
Retailer 5
-
HK$5,374 HKD
$685 USD
View
A
Retailer 6
-
HK$5,429 HKD
$692 USD
View
A
Retailer 7
-
HK$5,454 HKD
€662 EUR
View
A
Retailer 8
-
HK$5,900 HKD
ZAR 12,149 ZAR
View
A
Retailer 9
-
HK$6,178 HKD
£620 GBP
View
A
Retailer 10
-
HK$7,971 HKD
A$1,563 AUD
View
A
Retailer 11
-
HK$8,112 HKD
$1,034 USD
View
A
Retailer 12
-
HK$11,363 HKD
$1,448 USD
View
B+
Retailer 13
-
HK$12,122 HKD
$1,545 USD
View
Retailer 14
-
HK$12,173 HKD
A$2,387 AUD
View
Price last confirmed 24 days ago
B+
Retailer 15
-
HK$12,726 HKD
SGD 2,192 SGD
View
B+
Retailer 16
-
HK$13,194 HKD
$1,682 USD
View
B+
Retailer 17
-
HK$13,491 HKD
£1,354 GBP
View
Retailer 18
-
HK$18,359 HKD
$2,340 USD
View
Price last confirmed 11 days ago
Most Expensive
B+
Brilliant Earth
22183635A · Oct 31
HK$19,144 HKD
$2,440 USD
View
18 more retailers have this diamond
Prices start from HK$3,099 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
1.51ct Cushion
HK$3,099 HKD