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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG754594875

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

Certificate IGI LG754594875

Diamond specifications and retailer prices

From $346 SGD
$271 USD
As of October 30, 2026
Save $2,556 SGD (88%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $2,902 SGD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG754594875 or 754594875. Listed at 25 retailers as of October 30, 2026, with prices from $346 to $2,902, a $2,556 spread on the same certified stone. Brilliant Earth lists it at $2,902. 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

1.28
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594875
Dimensions7.95 × 5.39 × 3.46 mm
L/W Ratio1.47
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
7.95 mm5.39 mm1.28 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594875
Side View
Table 60.0%Crown 42.5°Girdle: MED-STKPavilion 32.7°Culet: NoneDepth 64.2%

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: $2,902 SGD|Low: $332 SGD|High: $3,401 SGD|Avg: $1,098 SGD|-14.7%
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 30, 2026
Retailer 4$346 SGD
Retailer 15$403 SGD
Retailer 10$407 SGD
Retailer 18$430 SGD
Retailer 3$445 SGD
Retailer 9$607 SGD
Retailer 13$607 SGD
Retailer 17$709 SGD
Retailer 12$738 SGD
Retailer 2$755 SGD
Retailer 11$1,046 SGD
Retailer 6$1,321 SGD
Retailer 5$1,382 SGD
Retailer 8$1,627 SGD
Retailer 14$1,724 SGD
Retailer 7$1,816 SGD
Retailer 16$2,378 SGD
Brilliant Earth$2,902 SGD

36 data points across 18 retailers

25 retailers$346 SGD to $2,902 SGD

A
Cheapest Retailer
-
$346 SGD
$271 USD
A
Retailer 2
-
$403 SGD
$315 USD
View
A
Retailer 3
-
$407 SGD
$318 USD
View
Final sale: no returns
A
Retailer 4
-
$430 SGD
$336 USD
View
Retailer 5
-
$445 SGD
£274 GBP
View
Price last confirmed 13 days ago
A
Retailer 6
-
$507 SGD
HK$3,100 HKD
View
A
Retailer 7
-
$607 SGD
$475 USD
View
A
Retailer 8
-
$607 SGD
$475 USD
View
Retailer 9
-
$709 SGD
€528 EUR
View
Price last confirmed 7 days ago
A
Retailer 10
-
$738 SGD
ZAR 9,332 ZAR
View
A
Retailer 11
-
$753 SGD
$589 USD
View
A
Retailer 12
-
$755 SGD
£465 GBP
View
B+
Retailer 13
-
$958 SGD
$749 USD
View
B+
Retailer 14
-
$1,046 SGD
A$1,259 AUD
View
B+
Retailer 15
-
$1,093 SGD
$855 USD
View
B+
Retailer 16
-
$1,321 SGD
$1,033 USD
View
B+
Retailer 17
-
$1,382 SGD
$1,081 USD
View
B+
Retailer 18
-
$1,447 SGD
$1,132 USD
View
B+
Retailer 19
-
$1,449 SGD
View
B
Retailer 20
-
$1,606 SGD
$1,256 USD
View
Retailer 21
-
$1,627 SGD
A$1,958 AUD
View
Price last confirmed 22 days ago
B
Retailer 22
-
$1,724 SGD
£1,062 GBP
View
B
Retailer 23
-
$1,816 SGD
$1,421 USD
View
Retailer 24
-
$2,378 SGD
$1,860 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
17981344A · Oct 30
$2,902 SGD
$2,270 USD
View
24 more retailers have this diamond
Prices start from $346 SGDSave up to $2,556 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
1.28ct Radiant
$346 SGD