The Green Phantom // check out this geometric caped crusader of Fluorite, another amazing crystal treasure posted by @therockhuntress. It a large chunk of gem fluorite with a green "phantom" zone inside it showing (very colourfully) the crystalline stages of its growth.
Magnolia 'Little Gem'-easily controlled to te 2.5-3m height range that suits your requirements ben. Will generally form a clipped block of foliage over time though not as dense as the lilly pilly we chatted about. *Could be used as a "pleached" hedge(stripping the trunk of foliage and promoting foliage on the top half of the plant) so that a second tier of plant material can be included underneath for a more dynamic visual aesthetic.
JADEITE AND DIAMOND 'TREE' BROOCH Designed as a tree, the brooch set with pear-shaped jadeites of translucent emerald green colour, decorated with rose- and brilliant-cut diamonds together weighing approximately 3.00 carats, mounted in 18 karat white and pink gold, with pendant fitting. Jadeites approximately 12.35 x 7.83 x 1.70mm to 9.28 x 6.30 x 1.65mm.