Ang Singsing nang Dalagang Marmol ("The Ring of the Marble Maiden"[1]), contemporarily rendered as Ang Singsing ng Dalagang Marmol in the Tagalog language, is a historical novel written by Filipino novelist, scholar, and labor leader Isabelo Florentino de los Reyes (also known as Isabelo de los Reyes, Sr.) before 1905.

[2] Through the novel, De los Reyes revealed his knowledge of the actual events during the Philippine–American War, making the subject as "integral elements" of the book.

[3] The novel was originally written by De los Reyes in Tagalog, and was published in the Ang Kapatid ng Bayan (literally "The Sibling [Brother or Sister] of the Country") newspaper.

The original cover featured Josefa Tiongson y Lara, more popularly known as "Jocelynang Baliwag", whom Isabelo Florentino de los Reyes courted and dedicated the novel with.

[2] In 2004, the Ateneo de Manila University Press republished Ang Singsing ng Dalagang Marmol by pairing it with Precioso Palma's Ipaghiganti Mo Ako...!