Radiant|Lab Grown|IGI

1.70ct D IF Radiant Lab Grown Diamond

GD • D/IF • IGI LG729529458

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

Certificate IGI LG729529458

Diamond specifications and retailer prices

From $832 USD
As of October 28, 2026
Save $3,488 USD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,320 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 IF clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG729529458 or 729529458. Listed at 11 retailers as of October 28, 2026, with prices from $832 to $4,320, a $3,488 spread on the same certified stone. Brilliant Earth lists it at $4,320. 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

1.70
Carat
D
Color
IF
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.2°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729529458
Dimensions8.44 × 5.89 × 3.88 mm
L/W Ratio1.43
Culet sizePointed
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
8.44 mm5.89 mm1.70 ctD / IF
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729529458
Side View
Table 67.0%Crown 46.2°Girdle: MediumPavilion 34.7°Culet: NoneDepth 65.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 28
Current: $4,320 USD|Low: $810 USD|High: $4,490 USD|Avg: $1,982 USD|-3.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 7$832 USD
Retailer 10$850 USD
Retailer 6$902 USD
Retailer 2$1,032 USD
Retailer 11$1,316 USD
Retailer 8$2,002 USD
Retailer 3$2,020 USD
Retailer 4$2,604 USD
Retailer 9$2,710 USD
Retailer 5$3,155 USD
Brilliant Earth$4,320 USD

41 data points across 11 retailers

11 retailers$832 USD to $4,320 USD

A
Cheapest Retailer
-
$832 USD
A
Retailer 2
-
$850 USD
View
A
Retailer 3
-
$902 USD
€859 EUR
View
B+
Retailer 4
-
$1,032 USD
£813 GBP
View
B+
Retailer 5
-
$1,316 USD
View
Retailer 6
-
$2,002 USD
A$3,080 AUD
View
Price last confirmed 29 days ago
B
Retailer 7
-
$2,020 USD
View
B
Retailer 8
-
$2,604 USD
£2,050 GBP
View
B
Retailer 9
-
$2,710 USD
View
Retailer 10
-
$3,155 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
16081761A · Oct 29
$4,320 USD
View
10 more retailers have this diamond
Prices start from $832 USDSave up to $3,488 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
$832 USD