Variation Selectors

Block from U+FE00 to U+FE0F. This block was introduced in Unicode version 3.2 (2002). It contains 16 codepoints.

The Wikipedia provides the following information on block Variation Selectors:

Variation Selectors is the block name of a Unicode code point block containing 16 variation selectors used to specify a glyph variant for a preceding character. They are currently used to specify standardized variation sequences for mathematical symbols, emoji symbols, 'Phags-pa letters, and CJK unified ideographs corresponding to CJK compatibility ideographs. At present only standardized variation sequences with VS1, VS2, VS3, VS15 and VS16 have been defined; VS15 and VS16 are reserved to request that a character should be displayed as text or as an emoji respectively.

Chart at Unicode.org (PDF)
Block at Decode Unicode

1. Variation Selector-1
2. Variation Selector-2
3. Variation Selector-3
4. Variation Selector-4
5. Variation Selector-5
6. Variation Selector-6
7. Variation Selector-7
8. Variation Selector-8
9. Variation Selector-9
10. Variation Selector-10
11. Variation Selector-11
12. Variation Selector-12
13. Variation Selector-13
14. Variation Selector-14
15. Variation Selector-15
16. Variation Selector-16