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Radiant|Lab Grown|IGI

1.70ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG818659742

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

Certificate IGI LG818659742

Diamond specifications and retailer prices

From $593 USD
As of October 27, 2026
Save $4,847 USD (89%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $5,440 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 LG818659742 or 818659742. Listed at 22 retailers as of October 27, 2026, with prices from $593 to $5,440, a $4,847 spread on the same certified stone. Brilliant Earth lists it at $5,440. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818659742
Dimensions8.20 × 6.12 × 3.97 mm
L/W Ratio1.34
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
8.20 mm6.12 mm1.70 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818659742
Side View
Table 66.0%Crown 42.8°Girdle: MED-STKPavilion 36.3°Culet: NoneDepth 64.9%

Caratlytics Score

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A+
Exceptional
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: $5,440 USD|Low: $593 USD|High: $5,440 USD|Avg: $2,033 USD
Brilliant Earth
Retailer 2
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Retailer 21
October 29, 2026
Retailer 12$593 USD
Retailer 20$664 USD
Retailer 16$688 USD
Retailer 11$735 USD
Retailer 18$779 USD
Retailer 17$865 USD
Retailer 4$1,128 USD
Retailer 2$1,145 USD
Retailer 3$1,199 USD
Retailer 15$1,263 USD
Retailer 6$1,348 USD
Retailer 5$1,658 USD
Retailer 9$1,932 USD
Retailer 7$2,134 USD
Retailer 19$2,345 USD
Retailer 8$2,377 USD
Retailer 10$2,500 USD
Retailer 13$3,207 USD
Retailer 21$3,505 USD
Retailer 14$4,055 USD
Brilliant Earth$5,440 USD

26 data points across 21 retailers

22 retailers$593 USD to $5,440 USD

A+
Cheapest Retailer
-
$593 USD
A
Retailer 2
-
$664 USD
View
A
Retailer 3
-
$688 USD
View
Final sale: no returns
Retailer 4
-
$733 USD
View
Price last confirmed 13 days ago
A
Retailer 5
-
$735 USD
View
A
Retailer 6
-
$779 USD
£614 GBP
View
A
Retailer 7
-
$865 USD
View
A
Retailer 8
-
$1,128 USD
View
A
Retailer 9
-
$1,145 USD
£902 GBP
View
A
Retailer 10
-
$1,199 USD
€1,142 EUR
View
B+
Retailer 11
-
$1,263 USD
ZAR 20,400 ZAR
View
B+
Retailer 12
-
$1,348 USD
View
B+
Retailer 13
-
$1,658 USD
View
B+
Retailer 14
-
$1,932 USD
View
B+
Retailer 15
-
$2,134 USD
£1,680 GBP
View
B+
Retailer 16
-
$2,345 USD
View
B+
Retailer 17
-
$2,377 USD
View
B+
Retailer 18
-
$2,500 USD
SGD 3,379 SGD
View
B
Retailer 19
-
$3,207 USD
£2,525 GBP
View
B
Retailer 20
-
$3,505 USD
View
B
Retailer 21
-
$4,055 USD
View
Most Expensive
B
Brilliant Earth
21421666A · Oct 29
$5,440 USD
View
21 more retailers have this diamond
Prices start from $593 USDSave up to $4,847 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
$593 USD