Here's a painting I did with an elaborate gold object in it:
http://www.michelerushworth.com/shauna2.htm
It seems to show a bit too red on my website, but you get the idea. The main problem I had to overcome is not making this large, shiny and elaborate object overwhelm the figure. You may have the same problem, depending on how much of the chair shows.
You could also go to this site:
http://www.hongminzou.com Under the category of portraits of women there's a three quarter of a blonde woman dressed in black in a gold chair. I think the whole portrait is beautifully painted. (I'd post the link here to his actual portrait but I think the site was designed with frames and the full url doesn't appear on each page. )
Hope that helps.