Translation:The ruby is a beautiful mineral.
Mmm for me, πέτρα is a bit too unspecific. Πέτρα is a direct translation to stone, and even in English, the ruby is considered a precious stone. But the word πετράδι could do. I'm not sure why, but it's used almost exclusively for precious stones and jewerly, even without the adjective πολύτιμο. ^.^
(Miner here). You're right. But it's just a naming convention. The difference is subtle. Ruby has Aluminium in it (Al2O3). So, technically, it has metal. But it's not excavated for its aluminium. That's why it's not classified as an ore.
I'm not sure if this is a difference every language makes, though.
This is out of my comfort zone, as I am not very familiar with geology, but to briefly explain the linguistics of this question:
"ορυκτό" comes from the ancient greek word "ὀρύσσω" which means "dig", so, broadly speaking, it's something you dig out of earth. The closest translation is mineral. A mineral that produces metal is called "μετάλλευμα".
Well, the difference is not one someone can easily explain. All ores are minerals, but not all minerals are ores. As some of other users already suggested, ores usually contain enough minerals for metal to be extracted. And since ruby is not a metal (even though it might contain a bit of that), it's safe to say that it isn't an ore, but a mineral.
As for the English translation, "Ruby is a beautiful stone/element." would be a much better sentence. Not only should the sentence NOT start with an article ("The") since it appears to be referring to rubies in general, but we also don't refer to gemstones as "minerals".
Can a DL moderator please update the primary sentence in English?
Yes, this is universally known that rubies are not "minerals", but are grown in the fields. :lol:
They are not mined in Thailand, in the Pailin and Samlout District of Cambodia, as well as in Afghanistan, Australia, Brazil, Colombia, India, Namibia, Japan, and Scotland, in Madagascar, Nepal, Pakistan, Tajikistan, Tanzania, and Vietnam. After all, it is known that miners in these countries do not mine rubies, but cultivate them underground. :lol:
Indeed, we should not refer to gems as minerals. :lol: God!!!