What is spina bifida? Spina bifida is a neural tube defect that develops during the first month of pregnancy when the spinal column does not close completely. What are the effects of spina bifida? The effects of spina bifida are different for every person.
Tsavorite or tsavolite is a variety of the garnet group species grossular, a calcium-aluminium garnet with the formula Ca3Al2Si3O12. Trace amounts of vanadium or chromium provide the green color.
Also known as opalite and Tifanny stone, opal fluorite is a purple gemstone with swirls of lavender and white, earning the gemstone the nickname ice cream opal. This purple rock is composed predominantly of opalized stone, mixed with other minerals like quartz and chalcedony.hile most popular in red, garnet also occurs as purple stones. The purple crystals come from the varieties of garnet called pyrope and spessartine. Blue garnet, the rarest of all garnets, itself turns into a purple stone under an incandescent light.