What can you tell me about my art nouveau jewelry?

I bought two pieces of art nouveau jewelry at an auction this weekend. One is a lavalier-type necklace, the other is a large pendant with two bails on the back. I would like to know more about them. I can't seem to find anything similar online. They are both hallmarked with 925 and what looks like a lion in a square. These are the links to the auctioneers website that have the lots:

The first one is in the upper left. It is oval and looks like two birds. It also has two stones on it.
http://www.seymourauctions.com/gallery/showphoto.php?photo=23915&papass=&sort=1&thecat=64

This is the second. It is the necklace that cuts through the center of the lot. It looks like a lavalier and has a lapis stone in it.
http://www.seymourauctions.com/gallery/showphoto.php?photo=23977&papass=&sort=1&thecat=64

925 refers to their sterling silver purity - here indicating a silver purity of 925 parts per thousand, or 92.5% silver content. As regards the lion marking, it tells you who made the pieces: compare the appearance of your lion with those listed at http://www.silvercollection.it/englishsilvermarksXJTRE.html
Thanks for writing about the lavalier-type necklace - I enjoyed looking the word up and finding out about Louis 1V mistress from whom the name was derived. You probably know all about it, but here is the link for anyone who is interested http://en.wikipedia.org/wiki/Duchesse_de_la_Valli%C3%A8re#Mistress



Art Nouveau Necklace


Amazing bronze tork necklace engraved art nouveau
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$20.00
Bids: 0
End time: 16-Mar-10 09:11:19 PST

RARE ART NOUVEAU IRIS IN ENAMEL & PEARL SILVER NECKLACE
Vintage Fine Jewellery > Art Nouveau (1895-1910)
$36.17
Bids: 0
End time: 14-Mar-10 08:15:00 PST

ANTIQUE ART NOUVEAU CASCADE BRASS FLOWER NECKLACE
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$9.99
Bids: 0
End time: 16-Mar-10 08:05:08 PST

ART NOUVEAU NECKLACE PENDANT FLYING VINTAGE LADY
Costume > Necklaces & Pendants
$3.98 Buy It Now
Bids: 0
End time: 08-Apr-10 06:00:43 PST

NewArt Nouveau Masked Woman Bizarre Surreal Necklace DIY
Pendants-Themed > Other
$6.99
Bids: 0
End time: 15-Mar-10 21:36:19 PST

Art Nouveau Whiting & Davis Co. (Mesh Bags) Necklace
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$44.95
Bids: 0
End time: 15-Mar-10 21:17:42 PST

OWL Art Nouveau & Vintage Style Charm Pendant Necklace
Costume > Necklaces & Pendants
$8.99Buy It Now: $24.99
Bids: 0
End time: 11-Mar-10 21:06:46 PST

Large Ornate Silver Ox Art Nouveau HARP LADY Necklace
Costume > Necklaces & Pendants
$9.99
Bids: 0
End time: 15-Mar-10 21:04:28 PST

Vintage Art Nouveau Deco Giant Clear Glass Necklace N/R
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$16.50
Bids: 2
End time: 15-Mar-10 20:03:13 PST

Czech Necklace Amethyst Glass Filigree Art Deco Nouveau
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$199.00
Bids: 0
End time: 15-Mar-10 19:55:54 PST

FAB! LARGE ART NOUVEAU REPOUSSE FLOWER BROOCH NECKLACE
Art Nouveau/Art Deco 1895-1935 > Pins, Brooches
$9.95
Bids: 0
End time: 15-Mar-10 19:30:23 PST

Becker 14k GOLD Art Nouveau Zodiac Pendant Necklace
Designer Brands > Other
RARE Collector's Item - Tested as SOLID GOLD
$1,845.00
Bids: 0
End time: 15-Mar-10 19:09:06 PST

Vintage LARGE ART NOUVEAU PAINTED NECKLACE NR
Designer, Signed > Necklaces & Pendants
$20.00
Bids: 0
End time: 18-Mar-10 18:56:21 PST

Art Nouveau/Art Deco Carnelian Necklace
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$9.99
Bids: 0
End time: 15-Mar-10 18:43:56 PST

Aqua, Aquamarine Floral, Art Nouveau Style Necklace Set
Jewelry Sets > Other
$5.00
Bids: 0
End time: 13-Mar-10 14:19:23 PST

ART NOUVEAU ~ DELICATE GLASS BEAD NECKLACE c.1920-35
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$2.92
Bids: 2
End time: 15-Mar-10 12:48:06 PST

LOVELY! Antique Art Nouveau Large Pendant Necklace
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$0.99
Bids: 1
End time: 15-Mar-10 12:37:33 PST

ART NOUVEAU 1/20 12k GF GUILLOCHE ROSE CAMEO NECKLACE
Victorian, Edwardian 1837-1910 > Necklaces & Pendants
$178.00 Buy It Now
Bids: 0
Best Offer Enabled
End time: 07-Apr-10 11:10:00 PST

ART DECO NOUVEAU BRASS REPOUSSE ROSES FLOWER NECKLACE
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$120.00 Buy It Now
Bids: 0
Best Offer Enabled
End time: 15-Mar-10 09:37:09 PST

ART DECO NOUVEAU ORNATE BLUE CAB CROSS NECKLACE PENDANT
Art Nouveau/Art Deco 1895-1935 > Necklaces & Pendants
$76.00 Buy It Now
Bids: 0
Best Offer Enabled
End time: 15-Mar-10 09:37:07 PST

View more items

Art Nouveau Necklace - News


Celebrated British jeweller quits Lon...
Celebrated British jeweller quits London's Bond StA prized item is an extremely rare Art Nouveau necklace from artist-jeweller Rene Lalique, in aquamarine and enamel, available for 165000 pounds. and more »

Smart Solutions: Fire up your outfit ...
Smart Solutions: Fire up your outfit with coral"Lately I've been seeing it a lot in pendants from the early-1900s Art Nouveau period and from the '60s and '70s when bold color started showing up in

damas unfurls masriera bagues' magica...
damas unfurls masriera bagues' magical array of collections!Masriera represents the modernist jewellery known internationally as Art Nouveau, and has a very clearly defined style based on the legacy of its acclaimed