Because like more valuable things they are much more rare and they are very hard to find.
Some rocks are more valuable than others because some are hard to find(rare)like diamonds and others like quartz are easy to find and are more common. Rarity Rare minerals will be more valuable than more common ones. Fairly common minerals, even if nicely colored and well formed, can be very affordable because of their commonness (unless they are exceptional in other regards). It is more valuable than gold because there is a few amount of gold and more dirt. So it is easy to find dirt than it is to find gold. That is why gold is more valuable than d … irt. because like more valuable things they are much more rare and they are very hard to find. many rocks are worthless because you can find them anywhere, but rare ones are expens … ive because they are much harder to come across....... .... and because wealthy people like things that shine, sparkle, and have pretty colors. Rarity is one of the most prized qualities of gemstones. However, it isn’t clear to people just how rare a given gem is. All of them are rare, but some are much more so than others. Many varieties of quartz. The most common crystallized mineral is quartz. Even today, with the popularity of outside activities, few people have ever seen a crystal in nature. because like more valuable things they are much more rare and they are very hard to find. many rocks are worthless because you can find them anywhere, but rare ones are expensive because they are much harder to come across....... .... and because wealthy people like things that shine, sparkle, and have pretty colors. because it is more rare and silver is more heavy there for less  portable   |   |   Have to partially disagree with the above statement. Gold is more  rare than … silver while it is still in the ground. Tons of factors!! first, is the difficulty of finding them. Like, Amber is found in trees, so is not that expensive, but diamonds are found in mines where thousands of workers have to starve to get only a handful a day. This makes the stone more expensive and valuable. Some rocks are more valuable than others because some are hard to find(rare)like diamonds and others like quartz are easy to find and are more common.
http://www.answers.com/Q/Why_are_some_minerals_more_valuable_than_others http://www.minerals.net/resource/Mineral_Value.aspx http://www.answers.com/Q/Why_are_gems_so_much_more_valuable_than_other_minerals http://www.answers.com/Q/Why_are_some_minerals_more_valuable_than_others https://www.gemsociety.org/article/how-rare-is-that-gem/ http://www.answers.com/Q/Why_are_gems_so_much_more_valuable_than_other_minerals http://www.answers.com/Q/Why_are_some_minerals_more_valuable_than_others https://answers.yahoo.com/question/index?qid=20080103203204AAZZhAs http://www.answers.com/Q/Why_are_gems_so_much_more_valuable_than_other_minerals
why are some minerals more rare than others