Q.I Have An Impatient That I’ve Kept In My Office Over The Winter. It Now Has Tiny Hard White Crystals On It. What Is It?
I’ve researched honeydew and guttation and it doesnt look like either of them. They are solid and look and feel like salt granules. They are mainly on the stalks although there are a few here and there along the edge of the leaves. It is exposed to light with average heat and humidity. The plant looks healthy but there are a couple of leaves with portions gone. The underside of the leaves are clean. I haven’t found anything that describes it.

Certified GKH Gardening Expert
Unfortunately, your photo did not come through. I am unable to see the damage.
It sounds like sap has been brought out at one point, and it has hardened. This can be caused by so many things, so unless you can see what caused it, then it may be impossible to determine.
In the meantime, here is an article that will give you insight into their proper care requirements:
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/growing-impatiens-flowers.htm