OreChanceConfig.json

{
    "version": "1", // never change this, internal version number
    "chanceToGetCopperOreWhenMined": 85, // chance to get copper ore when mined
    "chanceToGetIronOreWhenMined": 70, // chance to get iron ore when mined
    "chanceToGetSilverOreWhenMined": 55, // chance to get silver ore when mined
    "chanceToGetGoldOreWhenMined": 50, // chance to get gold ore when mined
    "chanceToGetGreenDiamondOreWhenMined": 25, // chance to get green diamond ore when mined
    "chanceToGetBlueDiamondOreWhenMined": 15, // chance to get blue diamond ore when mined
    "chanceToGetRedDiamondOreWhenMined": 10 // chance to get red diamond ore when mined
}