ROOT BEER (aka BROWN BOTTLEGLASS) OPAL is technically a type of CRYSTAL opal, and the darker shades would also be a type of SEMI DARK or SEMI BLACK opal.  

FIRE OPALS have a warm, yellow-orange-red-reddish brown base color.  They can be common fire opal (no colorplay) or PRECIOUS FIRE OPAL (showing play of colors).  The best examples of fire opal are those from Mexico and the newer  fire opal from Juniper Ridge, Oregon.

VIRGIN VALLEY OPAL from northern Nevada USA is considered to be the brightest, most colorful opal on the planet.  

Most Virgin Valley Opal is for specimen purposes only and these are the most beautiful specimens found anywhere.  This is because the vast majority of the opal found in Virgin Valley has stability problems and crazes/cracks soon after removal from the ground.  Rarely opal from the valley can cut proven stable gems but when they do they are among the highest priced opals in the world and are far more rare and valuable as collectors gems than opal from major fields producing vast amounts of stable stones.

The opal in Virgin Valley is found in-place within a defined zone of hard clay of bentonite/montmorillionite.  Most pieces are solid precious opal CASTS (without any petrified wood) that replaced the wood twhich rotted away and the silica solution that formed the opal percolated into the empty cavities and formed the opal.  Some precious opal is also found associated with petrified wood but precious wood opal (like conk) is extremely rare and valuable.  


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OPAL VALUE AND PRICING

VIRGIN VALLEY OPAL TYPES:


  • BLACK OPAL
  • SEMIBLACK OPAL
  • GREY OPAL
  • ROOT BEER OPAL
  • CRYSTAL OPAL
  • JELLY OPAL
  • CREAM OPAL
  • WHITE OPAL
  • FIRE OPAL
  • CONTRALUZ OPAL
  • WOOD OPAL


PRECIOUS OPAL: Shows a changing play of colors, sometimes incorrectly called "Fire."

COMMON OPAL: Does NOT show changing play of colors, also called "POTCH.".



JELLY and CRYSTAL OPAL are often mixed in the same piece.  JELLY is more cloudy or "hazy"  while CRYSTAL is more CLEAR.

EXAMPLES OF VIRGIN VALLEY NEVADA ROOT BEER OPAL:

WOOD OPAL, also known as OPALIZED WOOD, or PETRIFIED WOOD OPAL, can be either common or precious.  The only valuable type is PRECIOUS OPALIZED WOOD, where the petrified wood has been partially associated or replaced by precious opal.  These can be veinlets, coatings, or cell replacements.  The rarest form is CONK OPAL.

EXAMPLES OF VIRGIN VALLEY NEVADA CRYSTAL OPAL:

Below are some examples of the different opal types found in Virgin Valley Nevada USA.



THERE ARE DIFFERENT TYPES OF OPAL in VIRGIN VALLEY.   COMMON OPAL is just that, "Common" and found all over the valley.   COMMON OPAL does not display the flashing play of colors.     PRECIOUS OPAL is rare, and shows the play of colors.  

Both common and precious opal have base colors such as white, cream, clear, crystal, root beer, jelly, black, grey, etc. 

EXAMPLES OF VIRGIN VALLEY NEVADA BLACK OPAL:

WELCOME TO DOMINION OPAL MINES OF VIRGIN VALLEY, NEVADA:

Home of the world-famousVirgin Valley Black Fire Opal & source of the world's finest Opal Specimens and opal collector gems.
 Several mines are open to rockhounds for fee digging of  precious black, crystal, fire, and other opal types. Opal Gem Mines & Mining Claims for sale.  Links to the Royal Peacock, Rainbow Ridge and Bonanza Opal Mines Fee Digs with information on the Virgin Valley Opal and Mines.  DOMINION OPAL MINES  is a private group of claims and mines which is not open to the public but we provide info on the public opal mines and fee digs.  There are opal mines and mining claims for sale in Virgin Valley, Nevada.

EXAMPLES OF VIRGIN VALLEY NEVADA SEMI-BLACK OPAL:

EXAMPLES OF VIRGIN VALLEY NEVADA WOOD OPAL, aka : OPALIZED WOOD; also a RARE variety called "CONK".

CONTRALUZ Opal is opal that does not show head on fire, it can be any color but is normally a clear crystal type; it shows color when light passes through the opal from behind, from the side, and/or from above towards you.  CONTRALUZ is spanish for "Against the Light.".  Sometimes called 90 or 45 degree fire in Virgin Valley.

Dominion Opal Mines of Virgin Valley Nevada

EXAMPLES OF VIRGIN VALLEY NEVADA WHITE OPAL:

EXAMPLES OF VIRGIN VALLEY NEVADA FIRE OPAL:

EXAMPLES OF VIRGIN VALLEY NEVADA GHOST (aka PHANTOM) OPAL:

EXAMPLES OF VIRGIN VALLEY NEVADA CONTRALUZ OPAL:

EXAMPLES OF VIRGIN VALLEY NEVADA JELLY OPAL: