एक बहुमूल्य रत्न जो चमकीला और बहुत कठोर होता है।

A transparent piece of diamond that has been cut and polished and is valued as a precious gem.

किसी वस्तु के अंदर का मूल तत्व या सार भाग।

Any substance possessing to a high degree the predominant properties of a plant or drug or other natural product from which it is extracted.