Home » Gemstones » Opal » Common Opal

Common Opal or "Potch"

Pictures of beautiful common opals



What is Common Opal?



The definition of "Common opal" is a stone that does not exhibit a "play of color". Although most of these stones are also "common" in appearance and do not attract commercial attention, some of them are beautiful. This material is given the name "common opal" because it is found in many locations throughout the world. Some people in the trade also call common opal by the name "potch".


Beautiful Common Opal



Gemstone hunters seek out specimens of common opal that are attractive, colorful and and accept a lustrous polish. They can be beautiful but simply lack a play of color that would earn them the name "precious". Common opal is frequently cut as a gemstone and can sell for attractive prices.


Examples of Common Opal



Shown at right is a beautiful blue teardrop-shaped stone cut from common opal mined in Peru. It is 13x8 millimeters in size and weighs 2.3 carats. Also at right is a collection of common opal 4 millimeter beads ranging from white to pink to lavendar in color. The material used to produce these beads was also mined in Peru. The third photo at right shows two Morado Opal cabochons. "Morado" is Spanish for "purple" and some stones cut from purple material mined in Mexico are given the trade name "Morado".






Find it on Geology.com




More from Geology.com


Ant Hill Garnets
Ant Hill Garnets - tiny garnets that ants haul to the surface and discard on their anthill.
Geologist Tools
Geologist Tools: Visit our store for a large selection of field and laboratory tools.
Gemstones of the World
Gemstones of the World - A book by Robert Schumann. Over one million copies sold.
wall maps
Wall Maps - World maps, United States maps, continent maps, maps of individual states.
rock tumblers
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Geo Rock Bags
Rock Bags - Durable field bags with pockets for carrying maps, books, specimens and tools.
Expansive Soil
Expansive Soil: Causes more damage than floods, hurricanes & tornadoes combined.
Stromboli Volcano
Stromboli Volcano: Geology, history, maps, plate tectonics and more.


blue common opal from Peru
A beautiful blue common opal cut into a 13x8 teardrop cabochon from material mined in Peru.




pink common opal from Peru
Attractive 4 millimeter beads cut from common opal mined in Peru.


purple "Morado" opal
Common opal with a purple color mine in some parts of Mexico is sold under the trade name "Morado" opal. It can be cut into beautiful cabochons.


More Gemstones
  Gem Mineral Collections
  Ruby and Sapphire
  100+ Gems
  Tourmaline
  Pictures of Opal
  Diamond
  Semiprecious vs. Precious
  Labradorite



© 2005-2016 Geology.com. All Rights Reserved.
Images, code, and content on this website are property of Geology.com and are protected by copyright law.
Geology.com does not grant permission for any use, republication, or redistribution.
Images, code and content owned by others are marked on the pages where they appear.