The following is a list of Rochester gems and minerals listed in our database. Click the pictures to get full data, click the X to remove the gem from the list.
Dumortierite: Dumortierite is a variety of gemstone of basic aluminum borosilicate with an orthorhombic crystal system. It appears usually in columnar or fibrous, radiating aggregates, sometimes reddish brown, dark blue, violet-blue. On the rare occasions that dumortierite forms crystals, they are prismatic. Faceted or prismatic blue or violet samples are rare, due to scarcity of individual crystals. It is (read full)
Gem5.com aims to provide easy to understand, searchable, sortable data related to gemstones.
We are a Koenig Media, LLC project and like our other ventures this one is free with no strings attached.
Platinum is a rare and precious metal that occurs as a Native Element, one of the rarest in the Earth's crust.
It resembles silver, bu
Pyrite is an iron sulphide mineral with a cubic crystal system and is dimorphous with marcasite.
It occurs as cubic crystals with stri
Diopside is a type of Clinopyroxene, which are abundant, rock-forming minerals. These are embedded and surface-growing crystals, short 
Hessonite is the brown-orange variety of Grossular, a nesosilicate in the Garnet group, with an isometric crystal system.
It appears w