Scrap value of jewelry?

I see people selling jewelry from time to time. With 10kt gold worth about $20 per gram and 18kt worth about $35 to $40 per gram, I'm wondering if there might not be some opportunity there. For the people that know their way around this stuff; how many grams would you estimate the jewelry in the following weighs?

Jade jewelry in 10k and 18k - Ottawa Jewellery & Watches For Sale - Kijiji Ottawa Canada.

If you can get the weight here is a good calculator. They have one for silver as well... Scrap Gold Weight Conversion and Melt Value Calculator

I don't see enough there to be worth scrapping. It may be worth it if you wanted it for the jewelry but the metal value isn't there.