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Oval|Lab Grown|IGI

0.51ct F SI1 Oval Lab Grown Diamond

EX • F/SI1 • IGI LG407936479

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG407936479

Diamond specifications and retailer prices

From $290 USD
As of October 31, 2026
Save $1,380 USD (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,670 USD at MOH London · As of November 1, 2026
View at MOH London

About this 0.51ct lab-grown oval diamond

This 0.51ct lab-grown oval sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG407936479 or 407936479. Listed at 12 retailers as of October 31, 2026, with prices from $290 to $1,670, a $1,380 spread on the same certified stone. MOH London lists it at $1,670. 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
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle36.2°
Pavilion angle41.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407936479
Dimensions6.09 × 4.53 × 2.84 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT) Type II
Top View
6.09 mm4.53 mm0.51 ctF / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG407936479
Side View
Table 61.5%Crown 36.2°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
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 31
Current: $1,670 USD|Low: $267 USD|High: $1,690 USD|Avg: $761 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 4$290 USD
Retailer 7$336 USD
Retailer 10$375 USD
Retailer 8$417 USD
Retailer 11$417 USD
Retailer 9$673 USD
Retailer 2$747 USD
Retailer 5$751 USD
Retailer 6$1,222 USD
Retailer 3$1,523 USD
MOH London$1,670 USD

42 data points across 11 retailers

12 retailers$290 USD to $1,670 USD

A
Cheapest Retailer
-
$290 USD
B+
Retailer 2
-
$336 USD
View
B+
Retailer 3
-
$375 USD
View
Final sale: no returns
B+
Retailer 4
-
$390 USD
View
B+
Retailer 5
-
$417 USD
View
Retailer 6
-
$417 USD
View
Price last confirmed 7 days ago
B
Retailer 7
-
$673 USD
View
B
Retailer 8
-
$747 USD
£588 GBP
View
B
Retailer 9
-
$1,222 USD
View
B
Retailer 10
-
$1,340 USD
View
B
Retailer 11
-
$1,523 USD
View
Most Expensive
B
MOH London
LG407936479 · Nov 1
$1,670 USD
£1,315 GBP
View
11 more retailers have this diamond
Prices start from $290 USDSave up to $1,380 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
0.51ct Oval
$290 USD