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Radiant|Lab Grown|IGI

11.78ct F SI1 Radiant Lab Grown Diamond

GD • F/SI1 • IGI LG726502748

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

Certificate IGI LG726502748

Diamond specifications and retailer prices

From $3,287 SGD
$2,570 USD
As of November 2, 2026
Save $4,444 SGD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,731 SGD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 11.78ct lab-grown radiant diamond

This 11.78ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG726502748 or 726502748. Listed at 8 retailers as of October 28, 2026, with prices from $3,287 to $7,731, a $4,444 spread on the same certified stone. Rare Carat lists it at $7,731. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

11.78
Carat
F
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.4°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG726502748
Dimensions16.90 × 11.29 × 7.26 mm
L/W Ratio1.50
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.90 mm11.29 mm11.78 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG726502748
Side View
Table 70.0%Crown 43.4°Girdle: MediumPavilion 36.9°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $7,731 SGD|Low: $3,155 SGD|High: $22,611 SGD|Avg: $7,349 SGD|-8.3%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 3$3,287 SGD
Retailer 6$3,576 SGD
Retailer 7$4,297 SGD
Retailer 2$5,595 SGD
Retailer 5$5,786 SGD
Retailer 8$6,132 SGD
Retailer 9$6,247 SGD
Rare Carat$7,731 SGD
Retailer 4$22,611 SGD

13 data points across 9 retailers

8 retailers$3,287 SGD to $7,731 SGD

B+
Cheapest Retailer
-
$3,287 SGD
$2,570 USD
B
Retailer 2
-
$3,576 SGD
$2,796 USD
View
B
Retailer 3
-
$4,297 SGD
$3,360 USD
View
B
Retailer 4
-
$5,595 SGD
$4,375 USD
View
C
Retailer 5
-
$5,786 SGD
$4,524 USD
View
Most Expensive
B
Rare Carat
1718830 · Oct 28
$7,731 SGD
$6,045 USD
View
5 more retailers have this diamond
Prices start from $3,287 SGDSave up to $4,444 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.

B+
11.78ct Radiant
$3,287 SGD