Monday, January 13, at 7:30pm
Culver City Veterans Complex Multipurpose Room

Mexican Fire Opal Cabs

Mexican Opal image

Mexican fire opal cabs are the opal equivalent to agates displayed in the matrix. The clear opal variety shows complex structures, just like in agates, however, they also show off an incredible display of color patterns that change dramatically with the angle of view or direction of lighting. These opals can be purchased from mine owners and resellers at the Tucson Mineral Show in February or from resellers at other mineral shows for prices far less than for gem-quality opals from other parts of the world.

In addition to their spectacular structural forms and variable displays of color, other unusual properties have been uncovered during the creation of a collection of over 10,000 closeup photographs of 3,000 cabs. Some show fire when held up to the light, while others show light patterns when shielded from bright light such as sunlight. Internal surfaces also cause remarkable light patterns to appear. Unique examples will be shown.

Jack Hobart is a retired Aerospace scientist who amassed a large collection of Lake Superior agates, including the rare copper agates presented to CCRMC during the September meeting. He began traveling to the Tucson Mineral Show in 2006 at which time the collection of opal cabs began. He has applied the new photography technique of focus stacking to reveal internal opal structure to remarkable detail. Some previously unknown features of these opals have been uncovered and documented in his new book, Canteras - Mexican Opals r at the 2015 GIA Annual Symposium featuring in Matrix, Spectacular Cabs of Fire. He was a presenteopal

He was a presenter at the 2015 GIA Annual Symposium featuring opals.

Future Meetings

  • February 10 - TBD (probably Silent Auction)
  • March 9 - TBD

General Meetings are held the second Monday of every month* at 7:30 p.m. in the Multi-Purpose Room in the Veterans Bldg., 4117 Overland Ave. The Multi-Purpose Room is located in back of the Veteran's Memorial Auditorium Building. When you enter the parking lot (from Culver Blvd - closest to Overland Blvd) walk to the right when facing the building. Around the corner, you will a sign leading to the Multi-Purpose room. Follow the sign and our meeting is in the room with all the glass windows and doors.

See you there!

*) Except if it falls on a federal holiday, Saturday and Sunday of the annual Fiesta of Gems show, and the day of the annual picnic.

Guests are always welcome.....

meeting room