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Oval|Lab Grown|IGI

1.86ct D SI1 Oval Lab Grown Diamond

GD • D/SI1 • IGI LG516238517

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG516238517

Diamond specifications and retailer prices

From £316 GBP
$424 USD
As of October 30, 2026
Save £687 GBP (68%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,004 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.86ct lab-grown oval diamond

This 1.86ct lab-grown oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG516238517 or 516238517. Listed at 12 retailers as of October 28, 2026, with prices from £316 to £1,004, a £687 spread on the same certified stone. Rare Carat lists it at £1,004. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.86
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG516238517
Dimensions9.79 × 6.98 × 4.34 mm
L/W Ratio1.40
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
9.79 mm6.98 mm1.86 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG516238517
Side View
Table 60.0%Crown 33.1°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,004 GBP|Low: £182 GBP|High: £1,057 GBP|Avg: £555 GBP|-5.0%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 6£182 GBP
Retailer 5£316 GBP
Retailer 2£332 GBP
Retailer 7£524 GBP
Retailer 4£587 GBP
Retailer 8£625 GBP
Retailer 9£630 GBP
Retailer 3£855 GBP
Rare Carat£1,004 GBP

42 data points across 9 retailers

12 retailers£316 GBP to £1,004 GBP

Retailer 1
-
£141 GBP
$189 USD
Price last confirmed 29 days ago
Retailer 2
-
£170 GBP
$228 USD
View
Price last confirmed 35 days ago
Retailer 3
-
£182 GBP
$244 USD
View
Price last confirmed 28 days ago
B
Retailer 4
-
£316 GBP
$424 USD
View
B+
Retailer 5
-
£332 GBP
View
B+
Retailer 6
-
£524 GBP
$702 USD
View
Retailer 7
-
£584 GBP
$783 USD
View
Price last confirmed 30 days ago
B
Retailer 8
-
£587 GBP
$786 USD
View
B
Retailer 9
-
£625 GBP
$837 USD
View
B
Retailer 10
-
£630 GBP
HK$6,600 HKD
View
B
Retailer 11
-
£855 GBP
View
Most Expensive
B
Rare Carat
516238517_l_516238517 · Oct 28
£1,004 GBP
$1,345 USD
View
11 more retailers have this diamond
Prices start from £316 GBPSave up to £687 GBP

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.

B+
1.86ct Oval
£316 GBP