CaratHunter
Plans
Oval|Lab Grown|IGI

1.51ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG685590864

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG685590864

Diamond specifications and retailer prices

From $273 USD
As of October 29, 2026
Save $2,157 USD (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,430 USD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.51ct lab-grown oval diamond

This 1.51ct 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 top-tier cut grade and certified by IGI LG685590864 or 685590864. Listed at 16 retailers as of October 29, 2026, with prices from $273 to $2,430, a $2,157 spread on the same certified stone. Do Amore Diamonds lists it at $2,430. 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

1.51
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685590864
Dimensions9.18 × 6.36 × 3.96 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.18 mm6.36 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685590864
Side View
Table 62.0%Crown 34.3°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 62.3%

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: $2,430 USD|Low: $262 USD|High: $2,430 USD|Avg: $776 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 10$273 USD
Retailer 13$317 USD
Retailer 4$339 USD
Retailer 11$339 USD
Retailer 2$418 USD
Retailer 3$600 USD
Retailer 6$664 USD
Retailer 8$688 USD
Retailer 5$798 USD
Retailer 9$1,041 USD
Retailer 12$1,203 USD
Retailer 7$1,507 USD
Do Amore Diamonds$2,430 USD

43 data points across 13 retailers

16 retailers$273 USD to $2,430 USD

A
Cheapest Retailer
-
$273 USD
A
Retailer 2
-
$317 USD
View
A
Retailer 3
-
$339 USD
View
A
Retailer 4
-
$339 USD
View
A
Retailer 5
-
$399 USD
View
A
Retailer 6
-
$418 USD
£329 GBP
View
B+
Retailer 7
-
$452 USD
View
B+
Retailer 8
-
$495 USD
View
B+
Retailer 9
-
$600 USD
View
B+
Retailer 10
-
$664 USD
£523 GBP
View
B+
Retailer 11
-
$688 USD
A$1,058 AUD
View
B+
Retailer 12
-
$798 USD
View
B
Retailer 13
-
$1,041 USD
View
B
Retailer 14
-
$1,203 USD
View
B
Retailer 15
-
$1,507 USD
£1,187 GBP
View
Most Expensive
B
Do Amore Diamonds
27-396100D34 · Oct 29
$2,430 USD
View
15 more retailers have this diamond
Prices start from $273 USDSave up to $2,157 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
1.51ct Oval
$273 USD