David K. Joyce

Arizona -Fluorescent Chalcedony-Opal, Black Hills, Graham County, AZ

Daniel and I collected these interesting chalcedony-opal specimens near Safford, AZ. They are botryoidal in habit with some occasional, small quartz crystals attached. Most importantly, they are brightly fluorescent under short wave U/V light.

All prices in Canadian dollars. For payment in US$, deduct 18% or multiply by 0.82.

Click on any of the following thumbnails to view a larger image of the specimen.

Item #29738 Quartz, var. Chalcedony, Opal 5.8x4.2x3.4 cm Largest Crystal Size: n/a $35.00 Black Hills Area Safford, Graham County Arizona, USA A really nice looking mound of botryoidal chalcedony and opal that fluoresces bright green in sw uv light. Very striking! DKDD	Item #29737 Quartz, var. Chalcedony, Opal 19.3x6.5x4.4 cm Largest Crystal Size: n/a $45.00 Black Hills Area Safford, Graham County Arizona, USA Lots of botryoidal silica tops a mound of siliceous sinter and is a bright fluorescent green under sw uv light. Striking! DKDD	Item #29736 Quartz, var. Chalcedony, Opal 4.1x3.4x3.0 cm Largest Crystal Size: n/a $35.00 Black Hills Area Safford, Graham County Arizona, USA A cool, little botryoidal mound of silica that has zoned, vibrant, green fluorescence in under sw uv light. Nice one! DKDD	Item #29734 Quartz, var. Chalcedony, Opal 4.6x3.7x3.5 cm Largest Crystal Size: 6mm $35.00 Black Hills Area Safford, Graham County Arizona, USA This one is actually a big botryoid of chalcedony-opal formed on top of a spray of larger quartz crystals. The best feature though is the bright green fluorescence under SW u-v light. DKDD
Item #29735 Quartz, var. Chalcedony, Opal 12.5x7.0x5.5 cm Largest Crystal Size: n/a $45.00 Black Hills Area Safford, Graham County Arizona, USA A mass off swirling, botryoidal chalcedony and opal where the top part of the specimen is very fluorescent while the lower part is not. Vibrant! Looks great! DKDD	Item #29732 Quartz, var. Chalcedony, Opal 5.5x5.1x2.2 cm Largest Crystal Size: n/a $35.00 Black Hills Area Safford, Graham County Arizona, USA A mound of botryoidal, white silica that fluoresces green in S-W u-v- light. Looks good in any light! :) DKDD	Item #29733 Quartz, var. Chalcedony, Opal 6.5x5.0x2.8 cm Largest Crystal Size: 4mm $35.00 Black Hills Area Safford, Graham County Arizona, USA This one is actually a plate of quartz crystal mounds with chalcedony-opal formed on parts of the quartz crystals. Interesting! DKDD	Item #29731 Quartz, var. Chalcedony, Opal 4.3x3.7x4.1 cm Largest Crystal Size: 1mm $35.00 Black Hills Area Safford, Graham County Arizona, USA An interesting mound of white botryoids with actual, small quartz crystals on the left. Fluoresces very nicely! DKDD
Item #29729 Quartz, var. Chalcedony, Opal 12.5x6.5x4.5 cm Largest Crystal Size: n/a $45.00 Black Hills Area Safford, Graham County Arizona, USA A larger, mound of botryoidal chalcedony-opal that looks pretty good in white light but super in u/v light! Great one for a fluorescent display! DKDD	Item #29730 Quartz, var. Chalcedony, Opal 13.0x7.6x6.6 cm Largest Crystal Size: n/a $65.00 Black Hills Area Safford, Graham County Arizona, USA A larger specimen of silica that is fluorescent across the top of the botryoids but less so in the lower part. Striking! Displays well. DKDD	Item #29727 Quartz, var chalcedony, Opal 8.4x6.8x3.5 cm Largest Crystal Size: n/a $40.00 Black Hills Safford, Graham County Arizona, USA A mound of white chalcedony and opal that fluoresces bright green in short wave light. Striking! DKDD	Item #29728 Quartz, var. Chalcedony, Opal 7.5x6.0x3.5 cm Largest Crystal Size: 3mm $45.00 Black Hills Area Safford, Graham County Arizona, USA This is probably the best looking specimen in white light! It is a couple of mounds of chalcedony-opal rimmed with small quartz crystals with a striking knob od silica on the top right that is not fluorescent. Sweet! DKDD
Item #29725 Quartz, Opal 11.0x7.0x7.1 cm Largest Crystal Size: n/a $45.00 Black Hills Safford, Graham County Arizona, USA A botryoidal mass of chalcedony and opal that shows excellent green fluorescence. DKDD	Item #29726 Chalcedony-Opal 9.7x8.5x6.5 cm Largest Crystal Size: n $45.00 Black Hills Safford, Graham County Arizona, USA A couple of areas of shiny chalcedony and opal are present on the front-top of this specimen. The lighter coloured silica fluoresces while the darker coloured does not. Displays well! DKDD