Answer:
Glittering points that downward thrust. Sparkling spears that never rust. What am I?
My first half means container. Not a lot of people understand my language.
I am a mountain at night meadow at day
I'm tall when I'm young and short when I'm old. What am I?
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.