Bicolour or multicoloured gemstones pitambari neelam bicolour sapphire and watermelon tourmaline etc. White stone semi precious gemstones crystals and gemstones pearl jewelry green colors gem stones bobs red crazy lace agate a very beautiful form of agate composed of uneven lacy layers of white cream red and some greys. These semi precious clear stones may have dark needle like inclusions of rutile which gives it the name rutilated quartz.