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Cushion|Lab Grown|IGI

1.31ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG840634921

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840634921

Diamond specifications and retailer prices

From HK$3,640 HKD
$464 USD
As of October 30, 2026
Save HK$14,946 HKD (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$18,586 HKD at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1.31ct lab-grown cushion diamond

This 1.31ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840634921 or 840634921. Listed at 14 retailers as of October 30, 2026, with prices from HK$3,640 to HK$18,586, a HK$14,946 spread on the same certified stone. Helzberg Diamonds lists it at HK$18,586. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634921
Dimensions7.59 × 5.48 × 3.81 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
7.59 mm5.48 mm1.31 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634921
Side View
Table 61.0%Crown 35.2°Girdle: STK-THKPavilion 35.8°Culet: NoneDepth 69.5%

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 30
Current: HK$18,586 HKD|Low: HK$3,640 HKD|High: HK$18,586 HKD|Avg: HK$9,674 HKD
Helzberg Diamonds
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
October 30, 2026
Retailer 3HK$3,640 HKD
Retailer 7HK$4,271 HKD
Retailer 11HK$6,080 HKD
Retailer 4HK$6,363 HKD
Retailer 9HK$6,459 HKD
Retailer 8HK$6,628 HKD
Retailer 10HK$6,920 HKD
Retailer 13HK$7,540 HKD
Retailer 5HK$12,773 HKD
Retailer 14HK$13,214 HKD
Retailer 12HK$14,817 HKD
Retailer 6HK$15,260 HKD
Retailer 2HK$16,241 HKD
Helzberg DiamondsHK$18,586 HKD

14 data points across 14 retailers

14 retailersHK$3,640 HKD to HK$18,586 HKD

A
Cheapest Retailer
-
HK$3,640 HKD
$464 USD
Final sale: no returns
A
Retailer 2
-
HK$4,271 HKD
£429 GBP
View
A
Retailer 3
-
HK$6,080 HKD
$775 USD
View
A
Retailer 4
-
HK$6,363 HKD
$811 USD
View
A
Retailer 5
-
HK$6,459 HKD
€784 EUR
View
A
Retailer 6
-
HK$6,628 HKD
£665 GBP
View
A
Retailer 7
-
HK$6,920 HKD
ZAR 14,249 ZAR
View
A
Retailer 8
-
HK$7,540 HKD
$961 USD
View
B+
Retailer 9
-
HK$12,773 HKD
SGD 2,200 SGD
View
B+
Retailer 10
-
HK$13,214 HKD
$1,684 USD
View
B
Retailer 11
-
HK$14,817 HKD
£1,487 GBP
View
Retailer 12
-
HK$15,260 HKD
$1,945 USD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
HK$16,241 HKD
$2,070 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJKPIH · Oct 30
HK$18,586 HKD
$2,369 USD
View
13 more retailers have this diamond
Prices start from HK$3,640 HKDSave up to HK$14,946 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
1.31ct Cushion
HK$3,640 HKD