silver
14karat
No. They mean the same thing.
14 Karat gold is more expensive, so to some it might be considered "better", but 10 Karat gold is more durable, so will scratch/bend less and could possibly last longer.
More expensive
silver
it depends on its color and size. Keep in mind that topaz is more expensive than Quartz
Topaz looks a little darker than gold.
You are wrong. Copper is NOT more expensive than gold.
gold is more expensive than iron simply because iron is more common and gold is also a purer metal
Yes, 14ct gold is more expensive than 9ct gold. This is because 14ct gold contains a higher percentage of pure gold compared to 9ct gold, making it more valuable.
As far as I know Spanish gold has been the most expensive. Perhaps not the rarest but the most expensive
Whilst pure topaz is actually colourless, it can generally be obtained in blue, pink, gold and green. Impure topaz is more typical and can be reddish-orange, yellow or wine-coloured.
Gold.
Gold will only be more expensive if it's entirely made of gold and not just golad platted
No, gold is more expensive than silver as it is more rare
platinum is more unique