“Polished thick section of amethyst crystal with trapiche-like pattern, inclusions of red hematite and black hematite phantom, transmitted light. Both sides of the section are shown. Child photos show color zoning in one of the arms of trapiche-like pattern and another section cut from the same crystal in transmitted and reflected light. Dmitry Stepanenko collection and photo. Gift of John Truax, USA.”

“Color zoning in one of the arms of trapiche-like pattern.”

“Another section cut from the same crystal, transmitted light. Both sides are shown.”

“Another section cut from the same crystal, reflected light.”