Referring to a type of mineral structure characterized by a crystallized form not visible without magnification.

सूक्ष्म क्रिस्टलीय

English Usage: The rock samples were examined under a microscope to determine if they were cryptocrystalline.

Hindi Usage: चट्टान के नमूनों का माइक्रोस्कोप के तहत परीक्षण किया गया कि क्या वे सूक्ष्म क्रिस्टलीय थे।