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Radiant|Lab Grown|IGI

1.78ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG780619896

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

Certificate IGI LG780619896

Diamond specifications and retailer prices

From $256 SGD
$200 USD
As of November 1, 2026
Save $1,944 SGD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,200 SGD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG780619896 or 780619896. Listed at 15 retailers as of November 1, 2026, with prices from $256 to $2,200, a $1,944 spread on the same certified stone. Do Amore Diamonds lists it at $2,200. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.78
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780619896
Dimensions8.34 × 6.27 × 4.19 mm
L/W Ratio1.33
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
8.34 mm6.27 mm1.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780619896
Side View
Table 66.0%Crown 37.6°Girdle: MED-STKPavilion 37°Culet: NoneDepth 66.9%

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: Nov 1
Current: $2,200 SGD|Low: $238 SGD|High: $2,289 SGD|Avg: $1,003 SGD|+4.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8$256 SGD
Retailer 11$337 SGD
Retailer 6$388 SGD
Retailer 4$518 SGD
Retailer 10$629 SGD
Retailer 7$803 SGD
Retailer 9$1,015 SGD
Retailer 3$1,407 SGD
Retailer 2$1,463 SGD
Retailer 5$1,496 SGD
Do Amore Diamonds$2,200 SGD

26 data points across 11 retailers

15 retailers$256 SGD to $2,200 SGD

Retailer 1
-
$229 SGD
$179 USD
Price last confirmed 31 days ago
A
Retailer 2
-
$256 SGD
$200 USD
View
Final sale: no returns
Retailer 3
-
$269 SGD
$210 USD
View
Price last confirmed 35 days ago
A
Retailer 4
-
$337 SGD
$263 USD
View
B+
Retailer 5
-
$388 SGD
$303 USD
View
A
Retailer 6
-
$518 SGD
€386 EUR
View
A
Retailer 7
-
$629 SGD
$492 USD
View
B+
Retailer 8
-
$803 SGD
$628 USD
View
B+
Retailer 9
-
$1,015 SGD
$793 USD
View
Retailer 10
-
$1,047 SGD
$819 USD
View
Price last confirmed 32 days ago
B+
Retailer 11
-
$1,273 SGD
$995 USD
View
B+
Retailer 12
-
$1,407 SGD
$1,100 USD
View
B+
Retailer 13
-
$1,463 SGD
£901 GBP
View
B
Retailer 14
-
$1,496 SGD
$1,170 USD
View
Most Expensive
B
Do Amore Diamonds
27-93711A3C9 · Nov 2
$2,200 SGD
$1,720 USD
View
14 more retailers have this diamond
Prices start from $256 SGDSave up to $1,944 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
$256 SGD