Nevada black opal. Few sights compare to a large black opal in your hand with the sun over your shoulder.
Nevada Black Opal
 This black dried without a crack. Dense dark opal with fluid colors on a light skin in a natural arrowhead shape. Bright pure colors of blue and violet under the green, & red with yellow shooting flames.  2 1/4" by 2 1/2" by 1/2"   STOLEN  from Crystals Opals in ASHLAND OR.
42 gm wet rough
color close up wetSemi-polished specimen black opal
This super gem specimen has been enhanced and is now a focal bead on a cord around my neck.  See last photo in opposite column.
Black Rootbeer crystal back lit Virgin Valley Opal.
Root Beer crystal "core" jelly specimen.These opals fill cavities or spaces in the clay layers and are complete with no broken surfaces.  1 3/4"x3/4"x1/2" with the full play of Virgin Valley Not Australian Play of Color.
Rootbeer core 360 degree color Virgin Valley Opal.
Looking back up the dome.
 Bluish Green plates of color with a prismatic effect.
The colors shift around like rolling bars or tubes of prismatic rainbows.