Nice Chalcedony specimens you have there. You are having difficulty identifying the “Crystal Habit” or “Crystal Shape” because these would be cryptocrystalline or microcrystalline quartz. These are not large scale mono-crystals as you perceive. At the Unit Cell level they would be Trigonal. No need to send these to the GIA at all. Just take the Specific Gravity and see if it is 2.60 (SG of Chalcedony). You can also polish a small flat and take a Refractive Index and see if it is 1.53 - 1.54 (RI of Chalcedony). I hope this prevents you from “going crazy”. 
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