Category: Science

What does do not spare mean?

1 tr to refrain from killing, punishing, harming, or injuring. 2 tr to release or relieve, as from pain, suffering, etc. 3 tr to refrain from using. spare...

How strong is emerald?

Emeralds are relatively strong gemstones, registering 7.5 - 8 on the Mohs scale of hardness. While they are fairly resilient to knocks, they can be chippe...