From one, there are now two.

Component Cost: 70 gp
Market Price: 150 gp
Key Skill: Arcana
Level: 6
Category: Creation
Time: 10 minutes
Duration: Special

Prior to performing this ritual, you fashion a crude clay replica of a small, inorganic object you possess that weighs no more than 2 pounds, such as a key. When you complete this ritual, the crude replica transforms into an exact copy of the original. It performs identically to the original in all mundane ways and is not recognizable as a fake, even by someone using the Arcana skill. A copy of a magic item is nonmagical.
    Once the duration expires, the object reverts to its original crude clay form.

Arcana Check ResultDuration
20 or lower10 minutes
21-301 hour
31-401 day
41 or higher1 week

Published in Forgotten Realms Player's Guide, page(s) 144.