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Round|Lab Grown|IGI

3.78ct H VS1 Round Lab Grown Diamond

ID • H/VS1 • IGI LG635451998

Shape and cutting style on the report: Round brilliant

Certificate IGI LG635451998

Diamond specifications and retailer prices

From $2,148 AUD
CA$2,096 CAD
As of October 30, 2026
Save $693 AUD (24%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $3,274 AUD at Rare Carat · As of July 12, 2026
View at Rare Carat

About this 3.78ct lab-grown round diamond

This 3.78ct lab-grown round sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG635451998 or 635451998. Listed at 3 retailers as of October 30, 2026, with a 32% 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
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635451998
Dimensions10.15 × 10.08 × 6.09 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.15 mm10.08 mm3.78 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635451998
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,274 AUD|Low: $417 AUD|High: $5,025 AUD|Avg: $2,114 AUD|-3.6%
Rare Carat
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
August 12, 2026
Retailer 3$447 AUD
Retailer 2$880 AUD
Retailer 8$911 AUD
Retailer 6$1,079 AUD
Retailer 4$1,173 AUD
Retailer 10$1,301 AUD
Retailer 13$1,412 AUD
Retailer 12$1,788 AUD
Retailer 11$1,941 AUD
Retailer 5$2,148 AUD
Retailer 9$2,704 AUD
Retailer 14$2,842 AUD
Rare Carat$3,274 AUD
Retailer 7$5,025 AUD

63 data points across 14 retailers

3 retailers$2,148 AUD to $2,842 AUD

B+
Cheapest Retailer
-
$2,148 AUD
CA$2,096 CAD
B
Retailer 2
-
$2,842 AUD
$1,996 USD
View
Most Expensive
Rare Carat
635451998 · Jul 12
$3,274 AUD
$2,300 USD
View
Price last confirmed 111 days ago
2 more retailers have this diamond
Prices start from $2,148 AUDSave up to $693 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.

B+
3.78ct Round
$2,148 AUD