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Cushion|Lab Grown|IGI

1.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG783648800

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG783648800

Diamond specifications and retailer prices

From HK$8,748 HKD
$1,115 USD
As of October 31, 2026
Save HK$9,846 HKD (53%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: HK$18,594 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG783648800 or 783648800. Listed at 4 retailers as of October 31, 2026, with prices from HK$8,748 to HK$18,594, a HK$9,846 spread on the same certified stone. Brilliant Earth lists it at HK$18,594. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783648800
Dimensions8.12 × 5.54 × 3.47 mm
L/W Ratio1.47
Girdle conditionFaceted
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
8.12 mm5.54 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783648800
Side View
Table 60.0%Crown 36.3°Girdle: THN-STKPavilion 33.7°Culet: NoneDepth 62.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: HK$18,594 HKD|Low: HK$5,610 HKD|High: HK$26,675 HKD|Avg: HK$14,470 HKD|-30.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 5HK$5,610 HKD
Retailer 2HK$8,748 HKD
Retailer 8HK$9,062 HKD
Retailer 11HK$11,253 HKD
Retailer 4HK$11,306 HKD
Retailer 10HK$11,688 HKD
Retailer 9HK$11,751 HKD
Retailer 12HK$13,361 HKD
Retailer 6HK$15,285 HKD
Brilliant EarthHK$18,594 HKD
Retailer 7HK$25,106 HKD
Retailer 3HK$25,209 HKD

16 data points across 12 retailers

4 retailersHK$8,748 HKD to HK$18,594 HKD

Retailer 1
-
HK$5,610 HKD
$715 USD
Price last confirmed 20 days ago
B+
Retailer 2
-
HK$8,748 HKD
$1,115 USD
View
Retailer 3
-
HK$15,285 HKD
£1,534 GBP
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
21401971Y · Oct 31
HK$18,594 HKD
$2,370 USD
View
3 more retailers have this diamond
Prices start from HK$8,748 HKDSave up to HK$9,846 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.

B+
1.28ct Cushion
HK$8,748 HKD