Enamelled Jewelry is a way for third world artisans to make large amouts of money which handicrafts rarely can do when they come from poor countries.
Third world people have a gift! They take their time and have infinite patience. Only they can make handicraft-intensive work which big city people would never want to take the time to do, as TIME IS MONEY
These can be done on a GOLD or SILVER base. Here is a TOUCAN done in
SILVER. 
This
reminds me of the very best jewelry done in MExico, in the city of TAXCO
which is an near Mexico City ..just an amazing hour long DRIVE through
something that was half SWISS ALPS and HALF TROPICAL JUNGLE with waterfalls....breathtaking
and you're in CUERNEVACA at Las Mananitas Hotel eating a superb Mexican
lunch al fresco while peacocks stroll by shaking their tails, then another
hour and you're in TAXCO!! HEAVEN ON EARTH.
Enamelling Gold creates a bigger price tag, however on the bright side, enamelling involves no costly stones. The paint is the design, paint is the gem. Now, Gold is costly but these finishes can be done on low alloy gold, not even 14 karat. Take a lookt at the URL below, FREY WILLE, an Austrian shop, which has a fabulous ONLINE shop and is a longtime manufacturer in this field. Check the designs. They are pieces that can be made by anyone familiar with enameling on top of metal.
http://www.freywilleusa.com/shopping/browse-by-design_9/
FREY WILLE offers intricate designs, featuring no gemstones yet a ring, earrings or bangle can cost 500$ and up. It's all in the enamel!
Persians and Hindus have thousand year traditions of this mode of creating
beaux objects. There's an ancient piece of jewelry now in a museum, from
the MIDDLE EAST. It is a bejewelled peacock, features enamel work. Imagine
this intricate peacock design, shown below, with aquarmarines or saphhires
or Diamonds. It would be worth hundreds of thousands of dollars. 
This actually is a box that holds .....well, there was no valium l0
centuries ago, so maybe it was perfume oils.
But it would make a dynamite brooch or pendant on a necklace.
http://enews.heywoodenamels.com/ is another great designer, a thousand years later. She is an Israeli who does classical Art Noveau designs.
NILESTONE dot com does
EGYPTIAN ENAMEL designs.
Visit their site.
http://www.simonaitalianjewelry.com/enameljewelry.html
is
where ITALIAN BEAUTY, SIMONA offers
her fabulous designs, and those of a half dozen other designers. Gabriela
Rivalta did this brooch which is not only a work of art, but at 1,800$
U.S.cy., a VALUE, it's beauty is well worth that sum.
She
offers earrings at even priceier rates, $2,300. Also by Laura.
These
beauties make plain old rock & gems kind of passe if you ask me! Start
downloading beautiful pictures, whether bouquets or seed catalogue pictures
of flowers. Carry them to your artisans to inspire them. For instance,
this ENAMEL RING is studded with FORGET ME NOTS right out of a BURPEE seed
catalogue. A scattering of small diamonds make it like no flower BURPEE
ever saw!
I
can imagine how many people would bend and stare down at your hand in awe.
Westerners have never seen anything so opulent. Imagine an enameled leaf
with a CABUCHON EMERALD like a drop of dew. A Mexican happy sun brooch
with a scattering of canary diamonds!
Print out these designs, and more you find by googling the words 'enamel'
and 'jewelry' and take the printouts to Mexico, India, Philippines,
China, all places were they're old hands at ENAMELLING! And you may find
that they can make a few dozen for you, at l00$ each. If that's too steep,
start in SILVER, build up your clientele by wholesaling to big JEWELRY
SHOPS. Always put 'made in China on back' or Made in Mexico. That's the
law.
And mark the alloy gold content as 12k or 14k.