I also enjoy this Elie Tahari "Greta" jeweled long cardigan (pictured right) -- especially the rounded jeweled cardigan and the patch pockets with the same jeweled applique. This could be one of those items perfect for transitioning from the work day to evenings out to weekends requiring fancy-casual attire. Made from viscose, polyamide, and elastane. Originally $498, Bluefly has it on sale for $213.99 (still expensive at 57% off). Find it here.
Finally, Inhabit's 100% cotton long black wrap cardigan is on sale for $89.99 (originally $288 -- 69% off). This is probably a weekend-only item, although it may be able to be stashed in the office in case of over-air-conditioning. Find the wrap cardigan here.