UFO Sighting in Live Oak, Florida on July 2nd 2015 – vertical cigar above tree top, then went straight up slowly

Wife & I saw vertical cigar black/purple/grey the eastern clouds had pinks and lavender colors, far off above tree line, seemed stationary, then after a few minutes slowly ascended, thru a wispy cloud but continued straight up like a rocket (we've seen many a launch & this was very different & no fire)& flight was smooth not like a Saturn rocket power. It passed thru another wisp cloud then a cloud like exhaust stayed w/it, like a jet or chem trail, it stayed with the vertical cigar & it speeded up into a thick cloud bank and we saw it no more. Both of us independently noticed the trail and the speed change.