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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG770641066

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG770641066

Diamond specifications and retailer prices

From HK$3,272 HKD
$417 USD
As of October 31, 2026
Save HK$15,872 HKD (83%) 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 LG770641066 or 770641066. Listed at 19 retailers as of October 31, 2026, with prices from HK$3,272 to HK$19,144, a HK$15,872 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
SymmetryVery Good
FluorescenceNone
Crown angle38.6°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770641066
Dimensions7.11 × 6.87 × 4.30 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.11 mm6.87 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG770641066
Side View
Table 56.0%Crown 38.6°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.6%

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$19,144 HKD|Low: HK$3,240 HKD|High: HK$27,303 HKD|Avg: HK$9,829 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
November 1, 2026
Retailer 13HK$3,272 HKD
Retailer 5HK$3,633 HKD
Retailer 2HK$3,740 HKD
Retailer 16HK$4,511 HKD
Retailer 4HK$5,618 HKD
Retailer 7HK$5,798 HKD
Retailer 15HK$6,242 HKD
Retailer 10HK$6,563 HKD
Retailer 11HK$6,623 HKD
Retailer 3HK$8,175 HKD
Retailer 6HK$9,101 HKD
Retailer 9HK$11,982 HKD
Retailer 8HK$13,705 HKD
Retailer 12HK$13,714 HKD
Retailer 14HK$14,269 HKD
Retailer 17HK$18,398 HKD
Brilliant EarthHK$19,144 HKD

35 data points across 17 retailers

19 retailersHK$3,272 HKD to HK$19,144 HKD

A
Cheapest Retailer
-
HK$3,272 HKD
$417 USD
Final sale: no returns
A
Retailer 2
-
HK$3,633 HKD
$463 USD
View
A
Retailer 3
-
HK$3,740 HKD
£375 GBP
View
A
Retailer 4
-
HK$4,511 HKD
$575 USD
View
A
Retailer 5
-
HK$5,618 HKD
$716 USD
View
A
Retailer 6
-
HK$5,798 HKD
$739 USD
View
A
Retailer 7
-
HK$6,242 HKD
ZAR 12,852 ZAR
View
A
Retailer 8
-
HK$6,563 HKD
£659 GBP
View
A
Retailer 9
-
HK$6,623 HKD
€804 EUR
View
A
Retailer 10
-
HK$8,175 HKD
$1,042 USD
View
A
Retailer 11
-
HK$9,101 HKD
$1,160 USD
View
B+
Retailer 12
-
HK$11,982 HKD
$1,527 USD
View
B+
Retailer 13
-
HK$12,239 HKD
$1,560 USD
View
B+
Retailer 14
-
HK$13,291 HKD
$1,694 USD
View
B+
Retailer 15
-
HK$13,705 HKD
$1,747 USD
View
B+
Retailer 16
-
HK$13,714 HKD
$1,748 USD
View
B+
Retailer 17
-
HK$14,269 HKD
£1,432 GBP
View
Retailer 18
-
HK$18,398 HKD
$2,345 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
20258573A · Oct 31
HK$19,144 HKD
$2,440 USD
View
18 more retailers have this diamond
Prices start from HK$3,272 HKDSave up to HK$15,872 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$3,272 HKD