Iron is the odd entry in this list.
I think the Indian Ocean is popular with iron, copper, titanium, diamonds, and maybe gold nuggets
Iron pyrite, a mineral composed of iron sulfide, FeS, is called fool's gold because it has the appearance (but no other properties) of gold.
Maybe iron, copper, gold, titanium, steel, bronze, etc
Iron Oxide. Pyrite is known also as "Fool's Gold"
Gabon is known for its mineral industry. Some of the mineral resources found in Gabon are manganese, gold, and iron ore. Manganese is the most prevalent of all these minerals in Gabon.
Silver, Iron, Diamonds, and Gold
Stratford Ontario, Canada : )
I think the Indian Ocean is popular with iron, copper, titanium, diamonds, and maybe gold nuggets
There isn't a state mineral but there is a state gem.Petrified Wood
the most common mineral mined in Australia is Quartz.They also mine for Gold, Coal,Iron ore,Nickel,and Diamonds.
Bauxite (aluminum ore). Guinea also mines iron, gold, diamonds, and uranium.
The hardness of glass is around 6, and the hardness of iron is about 5. So your mineral is probably around a 5.5.
Diamonds, Gold, Iron Ore,
Iron Pyrite - which is a sulphide mineral - FeS2.
Iron pyrite, a mineral composed of iron sulfide, FeS, is called fool's gold because it has the appearance (but no other properties) of gold.
gold,diamonds,iron
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5