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Radiant|Lab Grown|IGI

1.78ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG620418140

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

Certificate IGI LG620418140

Diamond specifications and retailer prices

From $454 SGD
$354 USD
As of October 27, 2026
Save $4,481 SGD (91%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $4,935 SGD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.78ct lab-grown radiant diamond

This 1.78ct 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 LG620418140 or 620418140. Listed at 26 retailers as of October 27, 2026, with prices from $454 to $4,935, a $4,481 spread on the same certified stone. Brilliant Earth lists it at $4,935. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620418140
Dimensions8.17 × 6.07 × 4.09 mm
L/W Ratio1.35
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
8.17 mm6.07 mm1.78 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620418140
Side View
Table 64.0%Crown 44.4°Girdle: MediumPavilion 33.8°Culet: NoneDepth 67.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $4,935 SGD|Low: $436 SGD|High: $4,947 SGD|Avg: $1,562 SGD|-0.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 29, 2026
Retailer 4$454 SGD
Retailer 9$527 SGD
Retailer 6$563 SGD
Retailer 10$563 SGD
Retailer 12$583 SGD
Retailer 3$750 SGD
Retailer 14$756 SGD
Retailer 13$968 SGD
Retailer 16$977 SGD
Retailer 2$1,013 SGD
Retailer 11$1,307 SGD
Retailer 18$1,651 SGD
Retailer 8$1,810 SGD
Retailer 7$2,128 SGD
Retailer 15$2,202 SGD
Retailer 5$2,227 SGD
Retailer 17$3,448 SGD
Brilliant Earth$4,935 SGD

35 data points across 18 retailers

26 retailers$454 SGD to $4,935 SGD

A
Cheapest Retailer
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$454 SGD
$354 USD
A
Retailer 2
-
$508 SGD
$396 USD
View
Final sale: no returns
A
Retailer 3
-
$527 SGD
$411 USD
View
A
Retailer 4
-
$563 SGD
$439 USD
View
A
Retailer 5
-
$563 SGD
$439 USD
View
A
Retailer 6
-
$583 SGD
£358 GBP
View
A
Retailer 7
-
$750 SGD
$585 USD
View
A
Retailer 8
-
$756 SGD
$590 USD
View
A
Retailer 9
-
$860 SGD
€639 EUR
View
A
Retailer 10
-
$904 SGD
$705 USD
View
A
Retailer 11
-
$968 SGD
ZAR 12,196 ZAR
View
A
Retailer 12
-
$977 SGD
€726 EUR
View
A
Retailer 13
-
$1,013 SGD
£623 GBP
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Retailer 14
-
$1,191 SGD
$929 USD
View
Price last confirmed 15 days ago
A
Retailer 15
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$1,307 SGD
A$1,569 AUD
View
B+
Retailer 16
-
$1,651 SGD
$1,288 USD
View
B+
Retailer 17
-
$1,775 SGD
$1,385 USD
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B+
Retailer 18
-
$1,810 SGD
$1,412 USD
View
B+
Retailer 19
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$1,863 SGD
$1,454 USD
View
B+
Retailer 20
-
$2,128 SGD
$1,660 USD
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B+
Retailer 21
-
$2,161 SGD
$1,686 USD
View
B+
Retailer 22
-
$2,202 SGD
£1,353 GBP
View
Retailer 23
-
$2,227 SGD
A$2,673 AUD
View
Price last confirmed 21 days ago
B+
Retailer 24
-
$2,372 SGD
$1,851 USD
View
Retailer 25
-
$3,448 SGD
$2,690 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
16509820A · Oct 28
$4,935 SGD
$3,850 USD
View
25 more retailers have this diamond
Prices start from $454 SGDSave up to $4,481 SGD

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
1.78ct Radiant
$454 SGD