In a museum catalog or label, the clearest Jain terminology is:

• Use pratima (pratima = idol/image/statue). This is the standard scholarly term for a Jain image.
• You can specify the context by adding the title, e.g. Jina Pratima or Tirthankara Pratima.
• Murti is a widely understood synonym in everyday language, but pratima is preferred in formal or academic labels.
• If you want to be precise about the figure, you can say Jina Pratima (e.g., Mahavira Pratima) or Adinath Pratima.

Suggested label formats (concise, in museum style):

• Jina Pratima of Mahavira
• Tirthankara Pratima: Parshvanath
• Jain idol (Pratima) of a 19th-century Svetambara Tirthankara

Notes:

• In Digambar and Śvetāmbara contexts, the essential term is pratima; both traditions use it for images/idols.
• If you include a traditional ritual context, you may add a note like “revered as a Jina” or “Jain sage depicted as a pratima.”

If you’d like, tell me the specific statue (which Tirthankara, period, and region) and I can craft precise museum-label language using pratima.