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Radiant|Lab Grown|IGI

1.70ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG818641530

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

Certificate IGI LG818641530

Diamond specifications and retailer prices

From $580 USD
As of October 27, 2026
Save $4,820 USD (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,400 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.7ct lab-grown radiant diamond

This 1.7ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818641530 or 818641530. Listed at 12 retailers as of October 27, 2026, with prices from $580 to $5,400, a $4,820 spread on the same certified stone. Brilliant Earth lists it at $5,400. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.70
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.1°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818641530
Dimensions8.59 × 5.82 × 3.94 mm
L/W Ratio1.48
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
8.59 mm5.82 mm1.70 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818641530
Side View
Table 63.0%Crown 43.1°Girdle: MED-STKPavilion 33.4°Culet: NoneDepth 67.7%

Caratlytics Score

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

Price History

Last verified: Oct 27
Current: $5,400 USD|Low: $580 USD|High: $6,600 USD|Avg: $2,757 USD|-18.2%
Brilliant Earth
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 29, 2026
Retailer 6$580 USD
Retailer 11$649 USD
Retailer 3$865 USD
Retailer 4$1,067 USD
Retailer 7$1,106 USD
Retailer 12$1,269 USD
Retailer 9$1,784 USD
Retailer 10$2,087 USD
Retailer 2$3,145 USD
Retailer 13$4,030 USD
Retailer 5$4,273 USD
Retailer 8$5,150 USD
Brilliant Earth$5,400 USD

28 data points across 13 retailers

12 retailers$580 USD to $5,400 USD

A
Cheapest Retailer
-
$580 USD
A
Retailer 2
-
$649 USD
View
A
Retailer 3
-
$865 USD
View
A
Retailer 4
-
$1,067 USD
View
A
Retailer 5
-
$1,106 USD
View
B+
Retailer 6
-
$1,269 USD
€1,209 EUR
View
B+
Retailer 7
-
$1,784 USD
View
B+
Retailer 8
-
$2,087 USD
View
B
Retailer 9
-
$3,145 USD
£2,476 GBP
View
B
Retailer 10
-
$4,030 USD
View
B
Retailer 11
-
$5,150 USD
View
Most Expensive
B
Brilliant Earth
21060216Y · Oct 29
$5,400 USD
View
11 more retailers have this diamond
Prices start from $580 USDSave up to $4,820 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
1.70ct Radiant
$580 USD