CaratHunter
Plans
Radiant|Lab Grown|IGI

1.70ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1

Diamond specifications and retailer prices

From $456 AUD
£251 GBP
As of October 29, 2026
Save $1,023 AUD (69%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,478 AUD at Blue Nile · As of October 29, 2026
View at Blue Nile

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 2 retailers as of October 29, 2026, with prices from $456 to $1,478, a $1,023 spread on the same certified stone. Blue Nile lists it at $1,478. 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

1.70
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions8.33 × 5.86 × 3.98 mm
L/W Ratio1.42
Top View
8.33 mm5.86 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 63.0%CrownGirdle: MediumPavilionCulet: NoneDepth 67.9%

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 29
Current: $1,478 AUD|Low: $268 AUD|High: $1,478 AUD|Avg: $745 AUD
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 4$268 AUD
Retailer 5$311 AUD
Retailer 2$456 AUD
Retailer 3$1,181 AUD
Blue Nile$1,478 AUD

18 data points across 5 retailers

2 retailers$456 AUD to $1,478 AUD

A
Cheapest Retailer
-
$456 AUD
£251 GBP
Most Expensive
B
Blue Nile
20299559 · Oct 29
$1,478 AUD
$1,036 USD
View
1 more retailer has this diamond
Prices start from $456 AUDSave up to $1,023 AUD

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
$456 AUD