Precious stone grading and appraisal system and equipment, namely, gem, mineral, and stone color comparison, referencing, grading and appraisal tool using a colored layer over reflective foil to mimic the color of gems, minerals and stones, and instruction manual for using the tool; gem, mineral, and stone color comparison, grading and appraisal tool using colored gel filters and reflective foil to mimic the color of gems, minerals and stones

'apprais':5,19,52 'color':14,23,31,48,55,64 'comparison':15,49 'equip':8 'filter':57 'foil':27,60 'gel':56 'gem':10,33,44,66 'grade':3,17,50 'instruct':38 'layer':24 'manual':39 'mimic':29,62 'miner':11,34,45,67 'name':9 'precious':1 'referenc':16 'reflect':26,59 'stone':2,13,36,47,69 'system':6 'tool':20,43,53 'use':21,41,54

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