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Marquise|Lab Grown|IGI

0.51ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG770686841

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG770686841

Diamond specifications and retailer prices

From $115 CAD
$82 USD
As of October 23, 2026
Save $417 CAD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,050 CAD at MOH London · As of October 18, 2026
View at MOH London

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG770686841 or 770686841. Listed at 16 retailers as of October 23, 2026, with a 363% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle33.1°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770686841
Dimensions8.17 × 4.21 × 2.55 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.17 mm4.21 mm0.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG770686841
Side View
Table 56.0%Crown 33.1°Girdle: MED-THKPavilion 37.2°Culet: NoneDepth 60.6%

Caratlytics Score

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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 23
Current: $1,050 CAD|Low: $111 CAD|High: $1,077 CAD|Avg: $343 CAD|-1.5%
MOH London
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 25, 2026
Retailer 9$115 CAD
Retailer 13$127 CAD
Retailer 8$133 CAD
Retailer 4$151 CAD
Retailer 3$224 CAD
Retailer 2$238 CAD
Retailer 15$275 CAD
Retailer 12$294 CAD
Retailer 6$311 CAD
Retailer 14$364 CAD
Retailer 7$413 CAD
Retailer 11$458 CAD
Retailer 5$469 CAD
Retailer 10$532 CAD
MOH London$1,050 CAD

39 data points across 15 retailers

16 retailers$115 CAD to $532 CAD

A
Cheapest Retailer
-
$115 CAD
$82 USD
A
Retailer 2
-
$133 CAD
$95 USD
View
A
Retailer 3
-
$151 CAD
$108 USD
View
Price last confirmed 10 days ago
A
Retailer 4
-
$179 CAD
HK$1,000 HKD
View
A
Retailer 5
-
$224 CAD
$160 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$238 CAD
£134 GBP
View
A
Retailer 7
-
$275 CAD
€187 EUR
View
B+
Retailer 8
-
$294 CAD
$210 USD
View
B+
Retailer 9
-
$311 CAD
$222 USD
View
Price last confirmed 11 days ago
B+
Retailer 10
-
$364 CAD
£205 GBP
View
B+
Retailer 11
-
$413 CAD
SGD 399 SGD
View
B+
Retailer 12
-
$458 CAD
$327 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
$469 CAD
$335 USD
View
B
Retailer 14
-
$532 CAD
$380 USD
View
B
Retailer 15
-
$532 CAD
$380 USD
View
Most Expensive
B
MOH London
LG770686841 · Oct 18
$1,050 CAD
£591 GBP
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from $115 CADSave up to $417 CAD

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
0.51ct Marquise
$115 CAD