This post will mainly focus on diamonds and emeralds, but will also include the other minerals. This post is also not so I can persuade people to sell me things cheaper, it is to advise people on how they can gain more income by lowering prices.Diamonds: diamonds are very hard to come across in single player minecraft, they would should be high in price on EMC, right? wrong! Diamonds are common, in fact! If you vote everyday you will get voting bonuses that tend to include diamonds. Prices are based on supply and demand. the supply is medium to high, and the demand is high. This would place the price of a diamond around 40 rupees to 60 rupees. However, what has happened in the player shops is that greed has factored into the equation and made the price boom. Currently, diamonds are priced at 75 rupees to 100 or so rupees.Emeralds:emeralds are also very hard to obtain in single player. However, unlike diamonds they have very little uses and are only used for prettiness. Emeralds are also voting bonuses so a player who votes would have quite a lot building up. but how would you get rid of them? You would sell them for on average 30 rupees. Again, this is too expensive as they have low demand and high supply. I recommend selling them for 15 rupees to 20 rupees.Gold: gold is not very rare and is quite useful as horses are a big business. Gold is used for tools, armour and golden foods. therefore, I would price it at around 8 rupees per single ingot.Ores: unless the ore is gold or iron, ores tend to be 1 or 2 rupees higher than the ingot purely because of the silk tough needed to obtain it. gold or iron should be about 1 rupee lower. Iron: iron is common and high in demand. This means you can get away for selling it slightly higher. I would recommend 3 or 4 rupees.