The Amethyst script was invented by Ian James and was modeled roughly on the component-based scripts of SIGIL. It is a simpler style of alphabet, easy to write, and still clear as to how the phonemic letters are derived and related to each other. It has been given a whimsical name.
Except for the labial and dental consonants, phonemes can be derived from the vowel regions. In all cases the glyphs are not assembled from individual sub-glyphs, but are made whole; this makes the encoding and printing very straight-forward.
As for /s/ and /z/, they are derived easily from the main dental fricatives. The begin-paragraph glyph is an 'unformed /b/', representing the mouth closed but ready with voicing. Likewise the end-paragraph glyph is a 'final unformed /p/', where the voicing is stopped.
Note that plosives sound an inherent schwa if not followed by an explicit vowel or final marker.
This is the beginning of Shakespeare's sonnet 18.
Shall I compare thee to a summer’s day?
Thou art more lovely and more temperate;
Rough winds do shake the darling buds of may,
And summer’s lease hath all too short a date.
All human beings are born free and equal in dignity and rights. They are endowed with
reason and conscience and should act towards one another in a spirit of brotherhood.
(Article 1 of the Universal Declaration of Human Rights)
Information about Amethyst