Spring is here! Today is the vernal equinox and you can feel it in the air.  No matter what, March is a month that shouts green. The buds on trees are popping, daffodils are pushing through frosty earth and spring is about to burst on the scene. What better way to match the energy of the spring season than with emeralds! Here are a few of Oscar Heyman’s most sumptuous greens.