True coral needs no painter's brush

स्वभावसुन्दरं वस्तु न संस्कारमपेक्षते ।
मुक्तारत्नस्य शाणाश्मघर्षणं नोपयुज्यते ॥

That which is naturally beautiful needs no refinement. Polishing stone does not add any more shine to a precious jewel.

True coral needs no painter's brush.