Fungal corneal ulcer, with excessive vascularization. Keratitis is a general term meaning any inflammation of the cornea. The term fungal keratitis refers to a corneal infection caused by fungi. One type of fungus that can infect the cornea is Fusarium.
Where do the Stones come from? Suiseki Stones are legally collected from a variety of streams and rivers across the world. Different rivers tend to create their own unique stone style due to the ecology of the river and the way in which the water develops the stones over time.
Origin and gemstone source. In some rare case it can comes from a meteorite, in small size, but they are really hard to find and never faceted or used in jewelry, the most common Peridot stones comes from igneous environments, they formed deep within the mantle of the earth, and are brought the the surface by volcanic activity.