Ilvaite is a rare mineral of calcium-iron-bearing silicate. 黑柱石是一種少見(jiàn)的含鈣鐵硅酸鹽礦物。
The interstitial net and aggregates may be of solid sulfide but most contain magnetite and silicate in widely varying proportions. 粒間網(wǎng)線(xiàn)及集結體可以是純硫化物,但大多數含有不同比例的磁鐵礦及硅酸鹽礦物。