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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG780696509

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

Certificate IGI LG780696509

Diamond specifications and retailer prices

From $299 SGD
$234 USD
As of October 30, 2026
Save $2,219 SGD (88%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,518 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780696509 or 780696509. Listed at 21 retailers as of October 30, 2026, with prices from $299 to $2,518, a $2,219 spread on the same certified stone. Brilliant Earth lists it at $2,518. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780696509
Dimensions7.62 × 5.24 × 3.48 mm
L/W Ratio1.45
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
7.62 mm5.24 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780696509
Side View
Table 62.0%Crown 28°Girdle: MediumPavilion 35.5°Culet: NoneDepth 66.4%

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 30
Current: $2,518 SGD|Low: $286 SGD|High: $3,145 SGD|Avg: $895 SGD|-19.9%
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
November 1, 2026
Retailer 15$299 SGD
Retailer 8$332 SGD
Retailer 5$346 SGD
Retailer 6$371 SGD
Retailer 16$371 SGD
Retailer 10$616 SGD
Retailer 4$628 SGD
Retailer 11$636 SGD
Retailer 7$676 SGD
Retailer 9$693 SGD
Retailer 12$903 SGD
Retailer 3$1,190 SGD
Retailer 14$1,194 SGD
Retailer 2$1,484 SGD
Retailer 13$2,359 SGD
Brilliant Earth$2,518 SGD

44 data points across 16 retailers

21 retailers$299 SGD to $2,518 SGD

A
Cheapest Retailer
-
$299 SGD
$234 USD
A
Retailer 2
-
$332 SGD
$260 USD
View
Final sale: no returns
A
Retailer 3
-
$346 SGD
$271 USD
View
Retailer 4
-
$371 SGD
$290 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$371 SGD
$290 USD
View
A
Retailer 6
-
$409 SGD
HK$2,500 HKD
View
A
Retailer 7
-
$616 SGD
€459 EUR
View
A
Retailer 8
-
$628 SGD
$491 USD
View
A
Retailer 9
-
$636 SGD
ZAR 8,039 ZAR
View
A
Retailer 10
-
$676 SGD
$529 USD
View
A
Retailer 11
-
$693 SGD
£427 GBP
View
A
Retailer 12
-
$903 SGD
A$1,087 AUD
View
B+
Retailer 13
-
$975 SGD
$763 USD
View
B+
Retailer 14
-
$1,190 SGD
$931 USD
View
B+
Retailer 15
-
$1,194 SGD
$934 USD
View
B+
Retailer 16
-
$1,197 SGD
View
B+
Retailer 17
-
$1,257 SGD
$983 USD
View
B+
Retailer 18
-
$1,484 SGD
£914 GBP
View
B
Retailer 19
-
$1,663 SGD
$1,301 USD
View
Retailer 20
-
$2,359 SGD
$1,845 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
19340393A · Oct 31
$2,518 SGD
$1,970 USD
View
20 more retailers have this diamond
Prices start from $299 SGDSave up to $2,219 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
1.21ct Radiant
$299 SGD