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Round|Lab Grown|IGI

3.78ct D VS1 Round Lab Grown Diamond

ID • D/VS1 • IGI LG708562687

Shape and cutting style on the report: Round brilliant

Certificate IGI LG708562687

Diamond specifications and retailer prices

From $661 USD
As of October 29, 2026
Save $5,209 USD (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,820 USD at Brilliant Earth · As of October 10, 2026
View at Brilliant Earth

About this 3.78ct lab-grown round diamond

This 3.78ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG708562687 or 708562687. Listed at 15 retailers as of October 29, 2026, with a 788% 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

3.78
Carat
D
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG708562687
Dimensions10.05 × 10.09 × 6.08 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.05 mm10.09 mm3.78 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG708562687
Side View
Table 59.0%Crown 32.9°Girdle: MediumPavilion 41°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
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 29
Current: $7,820 USD|Low: $527 USD|High: $8,060 USD|Avg: $2,190 USD|-3.0%
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
October 28, 2026
Retailer 10$661 USD
Retailer 9$719 USD
Retailer 4$739 USD
Retailer 8$767 USD
Retailer 15$767 USD
Retailer 13$1,083 USD
Retailer 2$1,085 USD
Retailer 3$1,101 USD
Retailer 7$1,114 USD
Retailer 6$1,604 USD
Retailer 12$1,905 USD
Retailer 14$2,615 USD
Retailer 11$4,185 USD
Retailer 5$5,870 USD
Brilliant Earth$7,820 USD

25 data points across 15 retailers

15 retailers$661 USD to $5,870 USD

A
Cheapest Retailer
-
$661 USD
A
Retailer 2
-
$719 USD
View
A
Retailer 3
-
$739 USD
View
Final sale: no returns
Retailer 4
-
$767 USD
View
Price last confirmed 17 days ago
A
Retailer 5
-
$767 USD
View
B+
Retailer 6
-
$1,083 USD
View
A
Retailer 7
-
$1,085 USD
View
A
Retailer 8
-
$1,101 USD
View
B+
Retailer 9
-
$1,604 USD
View
Retailer 10
-
$1,889 USD
View
Price last confirmed 31 days ago
Retailer 11
-
$1,905 USD
View
Price last confirmed 7 days ago
B+
Retailer 12
-
$2,615 USD
View
Retailer 13
-
$4,185 USD
View
Price last confirmed 12 days ago
B
Retailer 14
-
$5,870 USD
View
Most Expensive
Brilliant Earth
20194196Y · Oct 10
$7,820 USD
View
Price under review
14 more retailers have this diamond
Prices start from $661 USDSave up to $5,209 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. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
3.78ct Round
$661 USD