In a world inhabited by crystalline lifeforms called The Lustrous, every unique gem must fight for their way of life against the threat of lunarians who would turn them into decorations. Phosphophyllite, the most fragile and brittle of gems, longs to join the battle.

When Phos is instead assigned to complete a natural history of their world, it sounds like a dull and pointless task. But this new job brings Phos into contact with Cinnabar, a gem forced to live in isolation, and their seemingly mundane assignment might lead both to the fulfillment they desire.

• Publisher: Kodansha Comics
• Publication date: June 27, 2017
• Edition: Illustrated
• Language: English
• Print length: 192 pages
• ISBN-10: 1632364972
• ISBN-13: 978-1632364975
• Item Weight: 0.5 lbs
• Reading age: 13 years and up
• Dimensions: 5.75 x 0.55 x 8.19 inches
• Grade level: 3 - 7
• Brand: Haruko Ichikawa
• Format: Paperback
• Genre: Fantasy, Action