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Heart|Lab Grown|IGI

5.51ct D VS1 Heart Lab Grown Diamond

EX • D/VS1 • IGI LG687554778

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG687554778

Diamond specifications and retailer prices

From $1,128 USD
As of October 31, 2026
Save $2,951 USD (72%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,079 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 5.51ct lab-grown heart diamond

This 5.51ct lab-grown heart sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG687554778 or 687554778. Listed at 17 retailers as of October 31, 2026, with prices from $1,128 to $4,079, a $2,951 spread on the same certified stone. Taylor and Hart lists it at $4,079. 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

5.51
Carat
D
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG687554778
Dimensions10.80 × 11.91 × 7.38 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.80 mm11.91 mm5.51 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG687554778
Side View
Table 55.0%Crown 37.4°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $2,371 USD|Low: $1,091 USD|High: $4,079 USD|Avg: $2,422 USD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Taylor and Hart
October 31, 2026
Retailer 4$1,128 USD
Retailer 5$1,175 USD
Retailer 9$1,305 USD
Retailer 3$1,608 USD
Retailer 6$1,686 USD
Retailer 10$1,868 USD
Retailer 1$2,371 USD
Retailer 7$2,376 USD
Retailer 12$2,444 USD
Retailer 13$2,996 USD
Retailer 11$3,598 USD
Retailer 2$3,627 USD
Retailer 8$3,988 USD
Taylor and Hart$4,079 USD

35 data points across 14 retailers

17 retailers$1,128 USD to $4,079 USD

Retailer 1
-
$973 USD
Price last confirmed 29 days ago
Retailer 2
-
$1,102 USD
View
Price last confirmed 33 days ago
A
Retailer 3
-
$1,128 USD
View
Final sale: no returns
Retailer 4
-
$1,175 USD
View
Price last confirmed 29 days ago
A
Retailer 5
-
$1,305 USD
View
A
Retailer 6
-
$1,608 USD
View
A
Retailer 7
-
$1,686 USD
£1,327 GBP
View
A
Retailer 8
-
$1,868 USD
View
Retailer 9
-
$2,203 USD
View
Price last confirmed 31 days ago
B+
Retailer 10
-
$2,371 USD
A$3,647 AUD
View
B+
Retailer 11
-
$2,376 USD
ZAR 38,392 ZAR
View
B+
Retailer 12
-
$2,444 USD
View
B+
Retailer 13
-
$2,996 USD
View
B
Retailer 14
-
$3,598 USD
View
B
Retailer 15
-
$3,627 USD
View
B
Retailer 16
-
$3,988 USD
£3,140 GBP
View
Most Expensive
B
Taylor and Hart
TCTIOL4 · Oct 31
$4,079 USD
View
16 more retailers have this diamond
Prices start from $1,128 USDSave up to $2,951 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
5.51ct Heart
$1,128 USD