Zara has, for a while now, been adding studs, sequins and other embellishment to the collars on its blouses as shown here on this Zara new season blouse, which costs £39.99
Zara also has this parrot shirt with diamante on the collar which costs £29.99.
Adopting a slightly different theme, they have also released this embroidered tulle blouse with pearls around the collar for £32.99 - so pretty.
For a white cotton shirt which is crystal embellished, take a look at Maje at Net-a-Porter
Embellished collars aren't going to appeal to everyone, so as an alternative way to get a similar look but with a little more flexibility, an embellished collar necklace can do a fantastic job. The obvious difference is that they can be worn with a variety of different pieces, from breton style tops, to fine knits, to collar-less shirts and plain t-shirts.
I have already shown you the NW3 beaded collar, which I wore when on holiday. It can be worn at a variety of different lengths, which makes it extra versatile.
For an alternative, look to Galibardy for a black pearl collar which, at £7.00, is a great way to test the water if you're not sure.
Dorothy Perkins offers a pastel bead collar for £12.50
together with this soft cream bead and pearl collar for £12.00
For velvet, sequins or fur options, look to Gemma Lister for a fantastic selection of collars, or to Zara for this black and lime mesh bib with gemstones which would be perfect for those who prefer something a little less girlie.
Primark, Next, Oasis, New Look, H&M - you will find them everywhere and from velvet, to sequins, to fur, to heavy embellishment to lace and leather - there will be something for everyone if you are tempted to dip your toe in the water.