Radiant|Lab Grown|IGI

3.51ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG706522012

Certificate IGI LG706522012

Diamond specifications and retailer prices

From $2,987 USD
Save $12,803 USD (81%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $15,790 USD at Brilliant Earth
View at Brilliant Earth

About this 3.51ct lab-grown radiant diamond

This 3.51ct 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 LG706522012 or 706522012. Listed at 25 retailers, with prices from $2,987 to $15,790 at Brilliant Earth, a $12,803 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

3.51
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG706522012
Dimensions11.16 × 7.68 × 4.99 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
11.16 mm7.68 mm3.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG706522012
Side View
Table 63.0%Crown 38°Girdle: MediumPavilion 35.1°Culet: NoneDepth 65.0%

Caratlytics Score

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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: $15,790 USD|Low: $2,388 USD|High: $15,840 USD|Avg: $6,931 USD|-0.3%
Brilliant Earth
Retailer 2
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Retailer 24
September 30, 2026
Retailer 13$2,987 USD
Retailer 22$3,250 USD
Retailer 7$3,345 USD
Retailer 3$3,417 USD
Retailer 5$3,461 USD
Retailer 23$3,465 USD
Retailer 10$3,625 USD
Retailer 15$4,019 USD
Retailer 14$4,251 USD
Retailer 2$4,330 USD
Retailer 18$4,782 USD
Retailer 9$5,135 USD
Retailer 11$5,195 USD
Retailer 24$5,862 USD
Retailer 8$5,974 USD
Retailer 17$7,417 USD
Retailer 20$7,836 USD
Retailer 19$7,900 USD
Retailer 21$8,889 USD
Retailer 6$9,365 USD
Retailer 12$10,088 USD
Retailer 4$11,633 USD
Retailer 16$12,064 USD
Brilliant Earth$15,790 USD

38 data points across 24 retailers

25 retailers$2,987 USD to $15,790 USD

A
Cheapest Retailer
-
$2,987 USD
A
Retailer 2
-
$3,250 USD
View
A
Retailer 3
-
$3,345 USD
View
A
Retailer 4
-
$3,417 USD
View
A
Retailer 5
-
$3,461 USD
View
A
Retailer 6
-
$3,465 USD
View
A
Retailer 7
-
$3,625 USD
View
A
Retailer 8
-
$4,019 USD
HK$31,400 HKD
View
A
Retailer 9
-
$4,251 USD
View
A
Retailer 10
-
$4,330 USD
View
B+
Retailer 11
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$4,792 USD
£3,774 GBP
View
B+
Retailer 12
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$5,135 USD
View
B+
Retailer 13
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$5,195 USD
View
B+
Retailer 14
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$5,862 USD
€5,583 EUR
View
B+
Retailer 15
-
$5,974 USD
£4,704 GBP
View
B+
Retailer 16
-
$7,417 USD
£5,840 GBP
View
B+
Retailer 17
-
$7,836 USD
A$12,056 AUD
View
B+
Retailer 18
-
$7,900 USD
ZAR 127,631 ZAR
View
B
Retailer 19
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$8,830 USD
View
B
Retailer 20
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$8,889 USD
£6,999 GBP
View
B
Retailer 21
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$9,365 USD
View
B
Retailer 22
-
$10,088 USD
View
B
Retailer 23
-
$11,633 USD
SGD 15,720 SGD
View
B
Retailer 24
-
$12,064 USD
View
Most Expensive
B
Brilliant Earth
14141959A · Oct 1
$15,790 USD
View
24 more retailers have this diamond
Prices start from $2,987 USDSave up to $12,803 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
3.51ct Radiant
$2,987 USD