-gold-
1. Why gold is expensive?
= gold is a scarce resource. it is difficult to find and to extract. it is also quite beautiful. it's rarity, beauty and desireability make it expensive.
2. Word first by discover gold?
=Hope diamond.
3.
Can I find out where my gold jewellery manufactured?
=Depending on the country that your gold jewellery was purchased in you may be able to tell where the gold jewellery was manufactured from the hallmarking on the item.