I have found a couple of Australian websites which offer some very beautiful pieces that are affordable and fashionable. They are not "cheap" (under $50), but they are not expensive (most pieces do not go above $200).

Lisa Marinucci (www.lisamarinucci.com.au) is the first jewellery designer that I will show a few pieces from that got my attention. Would love to buy a couple with some money I get over Christmas :)
Here are a few of my favourites (these could be some great ideas for a gift):Purple and Blue woven filigree disc bracelet-$98 I NEED this bracelet, it's so dainty and the detail is gorgeous. That touch of colour is perfect for summer.Black nickel flower and bow pendant necklace-$115
Looks almost gothic inspired, very antique Crowning glory pendant necklace-$89 Love the filigree and the pearl drop, great detail Petite white rose earrings -$55 So dainty and feminine, love these! Black and silver multi strand bracelet (Black onyx and semi precious stones) - $115 How cute are those little roses and the beads... so cute!

My second jewellery designer pick is Samantha Wills (www.samanthawills.com.au) which I have posted about before, she has a great idea for Christmas gifts, which are these boxes with matching pieces for an affordable price: