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Oval|Lab Grown|IGI

1.23ct D FL Oval Lab Grown Diamond

ID • D/FL • IGI LG818684610

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG818684610

Diamond specifications and retailer prices

From £352 GBP
$471 USD
As of November 1, 2026
Save £1,238 GBP (78%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,955 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.23ct lab-grown oval diamond

This 1.23ct lab-grown oval sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818684610 or 818684610. Listed at 7 retailers as of October 31, 2026, with a 352% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818684610
Dimensions9.11 × 5.78 × 3.69 mm
L/W Ratio1.58
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
9.11 mm5.78 mm1.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818684610
Side View
Table 61.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,955 GBP|Low: £130 GBP|High: £2,276 GBP|Avg: £781 GBP|-0.4%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
November 1, 2026
Retailer 5£130 GBP
Retailer 7£152 GBP
Retailer 11£352 GBP
Retailer 16£369 GBP
Retailer 15£392 GBP
Retailer 14£433 GBP
Retailer 6£592 GBP
Retailer 9£663 GBP
Retailer 13£744 GBP
Retailer 4£799 GBP
Retailer 8£801 GBP
Retailer 3£864 GBP
Retailer 2£910 GBP
Retailer 10£1,485 GBP
Retailer 12£1,590 GBP
Rare Carat£1,955 GBP

18 data points across 16 retailers

7 retailers£352 GBP to £1,590 GBP

A
Cheapest Retailer
-
£352 GBP
$471 USD
B+
Retailer 2
-
£663 GBP
$889 USD
View
B+
Retailer 3
-
£744 GBP
$997 USD
View
B+
Retailer 4
-
£910 GBP
View
B
Retailer 5
-
£1,485 GBP
$1,990 USD
View
B
Retailer 6
-
£1,590 GBP
$2,130 USD
View
Most Expensive
Rare Carat
PD-225817 · Oct 21
£1,955 GBP
$2,620 USD
View
Price last confirmed 11 days ago
6 more retailers have this diamond
Prices start from £352 GBPSave up to £1,238 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.

A
1.23ct Oval
£352 GBP