This appears to be a deco piece, Dancer

Hi Bart,

Thank you for contacting Mearto with your appraisal inquiry.
There are three metals that are magnetic: iron, cobalt and nickel. Additionally, alloys that contain those metals are also magnetic; these include steel and stainless steel. If this is very light in weight, I would think it would be nickel where iron would be quite a bit heavier. Steel and stainless steel are heavier than nickel but not as heavy as iron. It is my guess - based on the photos - that this is steel or stainless steel, the latter of which was a very popular material in the 1930s and 40s.
Based on the photos and information provided, and subject to examination, this is:

A vintage Art Deco style steel or iron statue of a dancer
European, mid 20th Century
The nude figure in contrapposto with classical drapery, on a reel-turned green marble base. Unmarked
Figure 8 inches tall; 10 inches tall overall
CONDITION: This appears to be in good condition; value assumes no breaks, repairs or losses.
PROVENANCE: Purchased at a garage or yard sale
$250-350*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia