In-authentic

So, if Amish quilts are authentic what does that mean? How can you tell? And what is in-authentic? Is it always bad? Here are a few more sketchbook pages...

The text here reads:

'Amish quilt. Very similar colours and pattern to drawing of faceted glass beads [below]. But, beads could be thought of as in-authentic and tacky - mass produced rather than carefully hand-crafted. How do these different elements of textiles fit together?'

Above is a quote from Vogue (Jan 2011, 'Princess of Cool', p.122)

'... They are [Sophia Coppola's films] dialogues between the superficial and the authentic, both of which can be beautiful, and between situations and feelings.' (My emphasis)

I'm interested in this; they way the in-authentic or tacky can also be beautiful and enduring - the difference between diamonds and sequins.