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Radiant|Lab Grown|IGI

3.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731566860

Certificate IGI LG731566860

Diamond specifications and retailer prices

From $1,550 USD
Save $11,480 USD (88%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $13,030 USD at Brilliant Earth
View at Brilliant Earth

About this 3.28ct lab-grown radiant diamond

This 3.28ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731566860 or 731566860. Listed at 26 retailers, with prices from $1,550 to $13,030 at Brilliant Earth, a $11,480 spread on the same certified stone. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.28
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731566860
Dimensions10.92 × 7.31 × 4.76 mm
L/W Ratio1.49
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
10.92 mm7.31 mm3.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731566860
Side View
Table 64.0%Crown 40.9°Girdle: MED-STKPavilion 33.4°Culet: NoneDepth 65.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Sep 30
Current: $13,030 USD|Low: $1,239 USD|High: $13,040 USD|Avg: $4,497 USD|-0.1%
Brilliant Earth
Retailer 2
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Retailer 26
October 1, 2026
Retailer 23$1,550 USD
Retailer 5$1,686 USD
Retailer 13$1,736 USD
Retailer 7$1,773 USD
Retailer 11$1,970 USD
Retailer 10$2,014 USD
Retailer 18$2,182 USD
Retailer 22$2,189 USD
Retailer 24$2,607 USD
Retailer 6$2,793 USD
Retailer 25$3,263 USD
Retailer 21$3,370 USD
Retailer 12$3,452 USD
Retailer 3$4,064 USD
Retailer 26$4,099 USD
Retailer 15$4,343 USD
Retailer 16$4,690 USD
Retailer 8$5,190 USD
Retailer 14$5,236 USD
Retailer 19$5,502 USD
Retailer 2$5,886 USD
Retailer 4$5,930 USD
Retailer 9$6,346 USD
Retailer 17$6,788 USD
Retailer 20$7,293 USD
Brilliant Earth$13,030 USD

40 data points across 26 retailers

26 retailers$1,550 USD to $13,030 USD

A
Cheapest Retailer
-
$1,550 USD
A
Retailer 2
-
$1,686 USD
View
A
Retailer 3
-
$1,736 USD
View
A
Retailer 4
-
$1,773 USD
View
A
Retailer 5
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$1,970 USD
View
A
Retailer 6
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$2,014 USD
View
A
Retailer 7
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$2,182 USD
View
A
Retailer 8
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$2,189 USD
HK$17,100 HKD
View
A
Retailer 9
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$2,613 USD
£2,058 GBP
View
A
Retailer 10
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$2,793 USD
€2,660 EUR
View
A
Retailer 11
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$3,263 USD
View
A
Retailer 12
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$3,370 USD
View
A
Retailer 13
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$3,452 USD
View
A
Retailer 14
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$4,064 USD
A$6,253 AUD
View
A
Retailer 15
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$4,099 USD
ZAR 66,224 ZAR
View
B+
Retailer 16
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$4,343 USD
£3,420 GBP
View
B+
Retailer 17
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$4,690 USD
View
B+
Retailer 18
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$5,190 USD
£4,087 GBP
View
B+
Retailer 19
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$5,236 USD
View
B+
Retailer 20
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$5,502 USD
View
B+
Retailer 21
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$5,886 USD
View
B+
Retailer 22
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$5,930 USD
View
B+
Retailer 23
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$6,346 USD
SGD 8,575 SGD
View
B+
Retailer 24
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$6,927 USD
View
B+
Retailer 25
-
$7,293 USD
A$11,220 AUD
View
Most Expensive
B
Brilliant Earth
15998918A · Sep 29
$13,030 USD
View
25 more retailers have this diamond
Prices start from $1,550 USDSave up to $11,480 USD

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.

A
3.28ct Radiant
$1,550 USD