Learn how to say Lockets correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word locket:
1a small ornamental case, typically made of gold or silver, worn round a person’s neck on a chain and used to hold things of sentimental value, such as a photograph.
2a metal plate or band on a scabbard.
late Middle English (in locket (sense 2)): from Old French locquet, diminutive of loc ‘latch, lock’, of Germanic origin; related to lock1. locket (sense 1) dates from the late 17th century