Ontario introduced time-of-use (TOU) pricing to reflect the costs of producing electricity at different times of the day. There are three TOU periods: 1  Off-peak, when energy demand is low and less expensive sources of electricity is used. 2  Mid-peak, when the cost of energy and demand are moderate. 3  On-peak, when demand is highest and more expensive forms of electricity production are used.
Sheen Obsidian-this is a family of valued types which consists of sub-types categorized according to the effect or color displayed. Microscopic bubbles and/or crystals of Feldspar or Mica trapped in the Obsidian result in a chatoyant (irridescent) sheen when the stone is viewed from certain angles.heen Obsidian-this is a family of valued types which consists of sub-types categorized according to the effect or color displayed. Microscopic bubbles and/or crystals of Feldspar or Mica trapped in the Obsidian result in a chatoyant (irridescent) sheen when the stone is viewed from certain angles.
Report Abuse. Obsidian is an igneous rock. Any and all igneous rocks can turn into any and all metamorphic or sedimentary rocks. Obviously what it will 'turn into' down the line is dependent on it's location and the environment at that location, but location and environment are never permanent.The midwest used to be a huge ocean, etc.he rock cycle is really really simple. There are three types of rocks. Any of the three can turn into any of the other two types, but it takes a combination of some or all of the following: time, erosion, compaction, lithification, melting, or partial melting. Marty Â· 6 years ago.