👉 The term "tourmalinic" is a term used in the field of crystallography, specifically in the study of minerals and rocks. It refers to the property of crystals where they have a distinctive color or pattern due to the presence of tourmaline (also known as quartz) within them. Tourmaline is a type of mineral that occurs naturally in many different forms, including quartz, tourmaline, and hematite. Tourmalinic minerals are typically found in the form