According to p 30 of the Caithness book, it's a Lantern vase from the '80s, designed by Colin Terris c '82 from the Glenisla range 6.52 tall.
This shape was also used in the Cadenza and Art Nuoveau series.
The illustration is of an Amethyst one, the base looks awfully deep purple for it to be neodynium.
But just bacause only that colour is illustrated does not mean it wasn't made in other colours.
The moss green looks absolutely right to me, and i have seen these vases around in different colours anyway. I see a fair bit of Caithness.
