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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 $3,667 AUD
$2,570 USD
As of November 2, 2026
Save $4,958 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $8,626 AUD 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 $3,667 to $8,626, a $4,958 spread on the same certified stone. Rare Carat lists it at $8,626. 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: $8,626 AUD|Low: $3,520 AUD|High: $25,228 AUD|Avg: $8,199 AUD|-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$3,667 AUD
Retailer 6$3,990 AUD
Retailer 7$4,794 AUD
Retailer 2$6,243 AUD
Retailer 5$6,455 AUD
Retailer 8$6,841 AUD
Retailer 9$6,970 AUD
Rare Carat$8,626 AUD
Retailer 4$25,228 AUD

13 data points across 9 retailers

8 retailers$3,667 AUD to $8,626 AUD

B+
Cheapest Retailer
-
$3,667 AUD
$2,570 USD
B
Retailer 2
-
$3,990 AUD
$2,796 USD
View
B
Retailer 3
-
$4,794 AUD
$3,360 USD
View
B
Retailer 4
-
$6,243 AUD
$4,375 USD
View
C
Retailer 5
-
$6,455 AUD
$4,524 USD
View
Most Expensive
B
Rare Carat
1718830 · Oct 28
$8,626 AUD
$6,045 USD
View
5 more retailers have this diamond
Prices start from $3,667 AUDSave up to $4,958 AUD

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
$3,667 AUD