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Oval|Lab Grown|IGI

12.27ct H VS1 Oval Lab Grown Diamond

ID • H/VS1 • IGI LG818686315

Shape and cutting style on the report: Antique oval cut

Certificate IGI LG818686315

Diamond specifications and retailer prices

From $5,253 AUD
$3,690 USD
As of October 29, 2026
Save $16,262 AUD (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $21,515 AUD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 12.27ct lab-grown oval diamond

This 12.27ct lab-grown oval sits in the over five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818686315 or 818686315. Listed at 14 retailers as of October 29, 2026, with prices from $5,253 to $21,515, a $16,262 spread on the same certified stone. Taylor and Hart lists it at $21,515. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

12.27
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686315
Dimensions21.52 × 11.36 × 7.13 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
21.52 mm11.36 mm12.27 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686315
Side View
Table 59.0%Crown 40.2°Girdle: STK-THKPavilion 40.5°Culet: LargeDepth 62.8%

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: Oct 29
Current: $11,417 AUD|Low: $5,253 AUD|High: $21,515 AUD|Avg: $10,172 AUD|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Taylor and Hart
November 1, 2026
Retailer 7$5,253 AUD
Retailer 8$6,094 AUD
Retailer 5$6,100 AUD
Retailer 6$8,241 AUD
Retailer 10$9,351 AUD
Retailer 4$9,432 AUD
Retailer 9$9,446 AUD
Retailer 3$9,803 AUD
Retailer 2$10,939 AUD
Retailer 1$11,417 AUD
Taylor and Hart$21,515 AUD

26 data points across 11 retailers

14 retailers$5,253 AUD to $21,515 AUD

A
Cheapest Retailer
-
$5,253 AUD
$3,690 USD
A
Retailer 2
-
$5,716 AUD
$4,015 USD
View
B+
Retailer 3
-
$6,094 AUD
$4,281 USD
View
Retailer 4
-
$6,094 AUD
$4,281 USD
View
Price last confirmed 20 days ago
A
Retailer 5
-
$6,100 AUD
$4,285 USD
View
B+
Retailer 6
-
$7,615 AUD
$5,349 USD
View
B+
Retailer 7
-
$8,241 AUD
$5,789 USD
View
B+
Retailer 8
-
$9,351 AUD
£5,172 GBP
View
B+
Retailer 9
-
$9,432 AUD
ZAR 107,034 ZAR
View
B+
Retailer 10
-
$9,446 AUD
$6,635 USD
View
B+
Retailer 11
-
$9,803 AUD
€6,558 EUR
View
B
Retailer 12
-
$10,939 AUD
$7,684 USD
View
B
Retailer 13
-
$11,417 AUD
View
Most Expensive
B
Taylor and Hart
8JZ5323 · Oct 31
$21,515 AUD
$15,113 USD
View
13 more retailers have this diamond
Prices start from $5,253 AUDSave up to $16,262 AUD

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
12.27ct Oval
$5,253 AUD