Tri-Ratnas are also called Threefold Refuge or Ratnatraya which are originally Samyak Darshana(right faith), Samyak Gyana(right knowledge),and Samyak Charitra(right conduct).
According to the Jain Philosophy, the Threefold Jewels or the Tri-Ratnas are the ways to achieve the purification of soul and liberation because only the liberated pure soul (Siddha) goes up to the summit of the universe (Siddhashila) and dwells there in eternal bliss.
As per the religious texts of Jainism, the right faith, right knowledge, and right conduct together constitute the direct path to liberation which means the perfect release from all karmas.
The Kalpa Sutra is the Jain text containing the biographies of the Jain Tirthankaras, most notably Parshvanath and Mahavira.
Kalpa Sutra was written by Bhadrabahu who was in the court of Chandragupta Maurya.
The first Tirthankara of Jainism was Rishabhdev and he is also known as Rishabhanatha and Adinatha.
Lord Mahavira was the Tirthankara of Jainism and regarded as the true founder of Jainism.
Parshvanath was the Tirthankara of Jainism.
Three Jewels (Triratnas) of Buddhism are Buddha, Dhamma, and Sangha