How are Agates Formed?doi:10.1080/00357529.1970.11763836Taylor & FrancisRocks & Minerals
These stones are then often sold as "citrine" or "prasiolite." Vendors who sell these stones should disclose the treatment because the "commercial identity" has changed. Some light-colored agates will turn brown or orange with heating, or black if they are first soaked in a sugar solution....
In the United States, agates are mostly found in Oregon, Washington, Idaho and Montana. Other southwestern and western states can be good agate localities – visit Arizona for fire agate and petrified wood, California for Mojave blue agate, or Colorado and Utah for some really amazing agates, ...
Agates are hard rocks formed by silica and water. Once sliced, agates reveal elaborate bands of color formed over time. Agates differ in color and appearance depending on where they were formed. A raw agate must be cut into slices and sanded on various grits of sandpaper before it is ready...
These very dense discharges are similar in appearance to fern fronds ("filiciform") or plume agates. Specimens exhibiting this form were heavily charged to just below the point of self-breakdown and then immediately discharged. If we reduce the amount of injected charge, more classical, ...
Herkimer diamond cleansing is a simple, easy process. All that is needed is some warm water, soap and a gentle brush. Herkimer diamonds are actually quartz – mostly from Herkimer County, NY – not true diamonds. Cleaning your crystals regularly will rev