黑尖晶（黑尖晶石，商业俗称“黑武士”）并非指一种具有“重工”的工艺，而是指一种天然的黑色尖晶石宝石，主要成分是镁铝氧化物，以其高硬度、耐高温和不褪色的特性而著称。它本身是一种矿物，没有“功能”一说，但常被误认为是具有能量和辟邪作用的物品，这与黑发晶的功效混淆。
Black spinel (commercially known as “Black Warrior”) does not refer to a type of “heavywork” craftsmanship, but rather to a natural black spinel gemstone. Its main component is magnesium aluminum oxide, and it is known for its high hardness, heat resistance, and colorfastness. As a mineral, it does not inherently possess “functions,” but it is often mistakenly believed to have energetic or protective properties—this is a common confusion with the metaphysical claims associated with black rutile quartz.
