Round|Lab Grown|IGI

5.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG818623896

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818623896

Diamond specifications and retailer prices

From $6,951 USD
As of October 31, 2026
Save $42,289 USD (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $49,240 USD at Mervis Diamond Importers · As of October 31, 2026
View at Mervis Diamond Importers

About this 5.51ct lab-grown round diamond

This 5.51ct lab-grown round sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818623896 or 818623896. Listed at 21 retailers as of October 31, 2026, with prices from $6,951 to $49,240, a $42,289 spread on the same certified stone. Mervis Diamond Importers lists it at $49,240. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818623896
Dimensions11.31 × 11.26 × 7.01 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.31 mm11.26 mm5.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818623896
Side View
Table 58.0%Crown 35.3°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.1%

Caratlytics Score

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A+
Exceptional
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 31
Current: $49,240 USD|Low: $6,951 USD|High: $59,033 USD|Avg: $19,061 USD|-16.6%
Mervis Diamond Importers
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
November 1, 2026
Retailer 7$6,951 USD
Retailer 9$7,185 USD
Retailer 15$8,535 USD
Retailer 14$8,562 USD
Retailer 5$9,190 USD
Retailer 2$9,950 USD
Retailer 16$10,446 USD
Retailer 13$12,555 USD
Retailer 8$14,930 USD
Retailer 12$15,974 USD
Retailer 11$16,147 USD
Retailer 10$18,325 USD
Retailer 3$19,817 USD
Retailer 6$27,193 USD
Retailer 4$42,710 USD
Mervis Diamond Importers$49,240 USD

38 data points across 16 retailers

21 retailers$6,951 USD to $49,240 USD

A+
Cheapest Retailer
-
$6,951 USD
Final sale: no returns
A
Retailer 2
-
$7,185 USD
View
Retailer 3
-
$7,410 USD
View
Price last confirmed 21 days ago
Retailer 4
-
$7,707 USD
View
Price last confirmed 18 days ago
A
Retailer 5
-
$8,535 USD
View
A
Retailer 6
-
$8,562 USD
View
Retailer 7
-
$8,596 USD
View
Price last confirmed 29 days ago
Retailer 8
-
$8,596 USD
View
Price last confirmed 19 days ago
Retailer 9
-
$9,190 USD
View
Price last confirmed 14 days ago
A
Retailer 10
-
$9,950 USD
£7,835 GBP
View
A
Retailer 11
-
$10,446 USD
View
Retailer 12
-
$10,671 USD
View
Price last confirmed 24 days ago
A
Retailer 13
-
$12,555 USD
€11,957 EUR
View
A
Retailer 14
-
$14,930 USD
View
A
Retailer 15
-
$15,974 USD
£12,578 GBP
View
A
Retailer 16
-
$16,147 USD
ZAR 260,864 ZAR
View
B+
Retailer 17
-
$18,325 USD
View
B+
Retailer 18
-
$19,817 USD
View
B+
Retailer 19
-
$27,193 USD
View
B
Retailer 20
-
$42,710 USD
View
Most Expensive
B
Mervis Diamond Importers
1984816699 · Oct 31
$49,240 USD
View
20 more retailers have this diamond
Prices start from $6,951 USDSave up to $42,289 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 Round
$6,951 USD