CaratHunter
Plans
Radiant|Lab Grown|IGI

0.51ct D FL Radiant Lab Grown Diamond

VG • D/FL • IGI LG818658686

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG818658686

Diamond specifications and retailer prices

From $238 USD
As of October 30, 2026
Save $996 USD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,234 USD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG818658686 or 818658686. Listed at 15 retailers as of October 30, 2026, with prices from $238 to $1,234, a $996 spread on the same certified stone. Reve Diamonds lists it at $1,234. 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

0.51
Carat
D
Color
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle29°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818658686
Dimensions5.78 × 4.05 × 2.67 mm
L/W Ratio1.43
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
5.78 mm4.05 mm0.51 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818658686
Side View
Table 70.0%Crown 29°Girdle: Slightly ThickPavilion 38.2°Culet: NoneDepth 65.9%

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 30
Current: $488 USD|Low: $238 USD|High: $1,234 USD|Avg: $634 USD|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Reve Diamonds
October 30, 2026
Retailer 9$238 USD
Retailer 10$364 USD
Retailer 7$372 USD
Retailer 5$442 USD
Retailer 3$477 USD
Retailer 1$488 USD
Retailer 8$567 USD
Retailer 6$851 USD
Retailer 2$901 USD
Retailer 4$1,059 USD
Reve Diamonds$1,234 USD

26 data points across 11 retailers

15 retailers$238 USD to $1,234 USD

Retailer 1
-
$213 USD
Price last confirmed 22 days ago
A
Retailer 2
-
$238 USD
View
Final sale: no returns
Retailer 3
-
$264 USD
View
Price last confirmed 18 days ago
Retailer 4
-
$264 USD
View
Price last confirmed 27 days ago
B+
Retailer 5
-
$364 USD
View
B+
Retailer 6
-
$372 USD
View
Retailer 7
-
$442 USD
€421 EUR
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$477 USD
ZAR 7,709 ZAR
View
B+
Retailer 9
-
$488 USD
£384 GBP
View
B
Retailer 10
-
$567 USD
View
Retailer 11
-
$848 USD
View
Price last confirmed 30 days ago
B
Retailer 12
-
$851 USD
View
B
Retailer 13
-
$901 USD
View
B
Retailer 14
-
$1,059 USD
£834 GBP
View
Most Expensive
B
Reve Diamonds
A8A2A97B3 · Oct 30
$1,234 USD
View
14 more retailers have this diamond
Prices start from $238 USDSave up to $996 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 Radiant
$238 USD