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Round|Lab Grown|IGI

3.78ct D VS1 Round Lab Grown Diamond

ID • D/VS1 • IGI LG815601387

Shape and cutting style on the report: Round brilliant

Certificate IGI LG815601387

Diamond specifications and retailer prices

From $864 AUD
$607 USD
As of October 29, 2026
Save $6,808 AUD (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,672 AUD at Brilliant Earth · As of October 29, 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 LG815601387 or 815601387. Listed at 14 retailers as of October 29, 2026, with prices from $864 to $7,672, a $6,808 spread on the same certified stone. Brilliant Earth lists it at $7,672. 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
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815601387
Dimensions9.93 × 10.01 × 6.11 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.93 mm10.01 mm3.78 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815601387
Side View
Table 60.0%Crown 33°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.2%

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: $7,672 AUD|Low: $836 AUD|High: $7,914 AUD|Avg: $3,299 AUD|-3.1%
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
October 29, 2026
Retailer 12$864 AUD
Retailer 10$968 AUD
Retailer 14$1,379 AUD
Retailer 5$1,606 AUD
Retailer 2$1,610 AUD
Retailer 9$2,277 AUD
Retailer 11$2,659 AUD
Retailer 8$2,662 AUD
Retailer 13$2,818 AUD
Retailer 3$3,205 AUD
Retailer 6$4,197 AUD
Retailer 7$4,677 AUD
Retailer 4$4,855 AUD
Brilliant Earth$7,672 AUD

30 data points across 14 retailers

14 retailers$864 AUD to $7,672 AUD

A
Cheapest Retailer
-
$864 AUD
$607 USD
A
Retailer 2
-
$968 AUD
$680 USD
View
Retailer 3
-
$1,379 AUD
£763 GBP
View
Price last confirmed 13 days ago
A
Retailer 4
-
$1,606 AUD
$1,128 USD
View
A
Retailer 5
-
$1,610 AUD
€1,077 EUR
View
Retailer 6
-
$2,277 AUD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$2,659 AUD
$1,868 USD
View
B+
Retailer 8
-
$2,662 AUD
$1,870 USD
View
B+
Retailer 9
-
$2,818 AUD
$1,980 USD
View
B+
Retailer 10
-
$3,205 AUD
$2,252 USD
View
Retailer 11
-
$4,197 AUD
SGD 3,985 SGD
View
Price last confirmed 17 days ago
B
Retailer 12
-
$4,677 AUD
£2,587 GBP
View
B
Retailer 13
-
$4,855 AUD
$3,411 USD
View
Most Expensive
B
Brilliant Earth
20803019A · Oct 29
$7,672 AUD
$5,390 USD
View
13 more retailers have this diamond
Prices start from $864 AUDSave up to $6,808 AUD

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
$864 AUD