Radiant|Lab Grown|IGI

2.78ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG717586153

Certificate IGI LG717586153

Diamond specifications and retailer prices

From $1,652 USD
Save $8,778 USD (84%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $10,450 USD at Brilliant Earth
View at Brilliant Earth

About this 2.78ct lab-grown radiant diamond

This 2.78ct lab-grown radiant sits in the two to three carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG717586153 or 717586153. Listed at 22 retailers, with a 531% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.78
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG717586153
Dimensions9.77 × 6.99 × 4.71 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.77 mm6.99 mm2.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG717586153
Side View
Table 62.0%Crown 39.7°Girdle: Slightly ThickPavilion 34.6°Culet: NoneDepth 67.4%

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: Oct 1
Current: $10,450 USD|Low: $1,179 USD|High: $10,450 USD|Avg: $3,933 USD|+0.3%
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 1, 2026
Retailer 13$1,652 USD
Retailer 9$1,830 USD
Retailer 2$1,880 USD
Retailer 15$2,477 USD
Retailer 8$2,560 USD
Retailer 10$2,603 USD
Retailer 12$2,705 USD
Retailer 18$3,204 USD
Retailer 17$4,130 USD
Retailer 6$4,256 USD
Retailer 3$4,536 USD
Retailer 5$4,640 USD
Retailer 11$4,985 USD
Retailer 4$5,175 USD
Retailer 14$5,264 USD
Retailer 7$5,835 USD
Retailer 16$6,021 USD
Brilliant Earth$10,450 USD

39 data points across 18 retailers

22 retailers$1,652 USD to $10,430 USD

A
Cheapest Retailer
-
$1,652 USD
A
Retailer 2
-
$1,830 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
$1,880 USD
View
A
Retailer 4
-
$2,480 USD
£1,953 GBP
View
A
Retailer 5
-
$2,560 USD
View
A
Retailer 6
-
$2,603 USD
€2,479 EUR
View
Price last confirmed 47 days ago
A
Retailer 7
-
$2,705 USD
View
A
Retailer 8
-
$3,204 USD
View
A
Retailer 9
-
$3,250 USD
View
B+
Retailer 10
-
$4,130 USD
£3,252 GBP
View
B+
Retailer 11
-
$4,256 USD
A$6,547 AUD
View
B+
Retailer 12
-
$4,536 USD
ZAR 73,274 ZAR
View
B+
Retailer 13
-
$4,640 USD
A$7,139 AUD
View
B+
Retailer 14
-
$4,654 USD
View
B+
Retailer 15
-
$4,985 USD
View
B+
Retailer 16
-
$5,175 USD
£4,075 GBP
View
B+
Retailer 17
-
$5,264 USD
View
B+
Retailer 18
-
$5,835 USD
View
B+
Retailer 19
-
$6,009 USD
View
Price last confirmed 22 days ago
B+
Retailer 20
-
$6,021 USD
View
B
Retailer 21
-
$10,430 USD
View
Most Expensive
B
Brilliant Earth
15031283A · Sep 14
$10,450 USD
View
Price last confirmed 17 days ago
21 more retailers have this diamond
Prices start from $1,652 USDSave up to $8,778 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
2.78ct Radiant
$1,652 USD