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0.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG685523343

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685523343

Diamond specifications and retailer prices

From €78 EUR
$87 USD
As of November 1, 2026
Save €681 EUR (90%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €759 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685523343 or 685523343. Listed at 15 retailers as of October 29, 2026, with prices from €78 to €759, a €681 spread on the same certified stone. MOH London lists it at €759. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685523343
Dimensions5.12 × 5.16 × 3.15 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
5.12 mm5.16 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685523343
Side View
Table 59.0%Crown 35.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.2%

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: Nov 1
Current: €759 EUR|Low: €78 EUR|High: €762 EUR|Avg: €244 EUR|+1.1%
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
November 1, 2026
Retailer 2€78 EUR
Retailer 14€87 EUR
Retailer 4€90 EUR
Retailer 13€103 EUR
Retailer 6€109 EUR
Retailer 8€143 EUR
Retailer 10€177 EUR
Retailer 3€207 EUR
Retailer 5€214 EUR
Retailer 7€238 EUR
Retailer 11€305 EUR
Retailer 15€311 EUR
Retailer 12€365 EUR
Retailer 9€746 EUR
MOH London€759 EUR

43 data points across 15 retailers

15 retailers€78 EUR to €759 EUR

A
Cheapest Retailer
-
€78 EUR
$87 USD
A
Retailer 2
-
€87 EUR
$97 USD
View
Final sale: no returns
A
Retailer 3
-
€90 EUR
$101 USD
View
A
Retailer 4
-
€103 EUR
$115 USD
View
Retailer 5
-
€109 EUR
$122 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
€143 EUR
$160 USD
View
A
Retailer 7
-
€177 EUR
£156 GBP
View
A
Retailer 8
-
€207 EUR
$231 USD
View
B+
Retailer 9
-
€214 EUR
View
B+
Retailer 10
-
€238 EUR
$266 USD
View
B+
Retailer 11
-
€305 EUR
$341 USD
View
B+
Retailer 12
-
€311 EUR
$348 USD
View
B+
Retailer 13
-
€365 EUR
$407 USD
View
B
Retailer 14
-
€746 EUR
$834 USD
View
Most Expensive
B
MOH London
LG685523343 · Oct 29
€759 EUR
£668 GBP
View
14 more retailers have this diamond
Prices start from €78 EURSave up to €681 EUR

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 Round
€78 EUR