BouchererBoucheronBulgari Black, Star & FrostCartier ChanelCharltonMarcusMaubisant MauboussinMazerNapierOscar HeymanPeacockRuser SchlumbergerTiffany Van Cleef & Arpels WebbWeissHarry Winston

Some "Estate Jewelry" styles:

Georgian 

A period from 1698 - 1830. Motifs consisted of bows, hearts, floral sprays, garlands, ribbons, birds, stars, featuring garnets, diamonds and pearls. 

Refers to a period of time encompassing the reign of England's Queen Victoria 1837 - 1901. The Victorian era is generally broken down into three phases, Early Victorian 1837 - 1850, Mid-Victorian 1850 - 1875, and Late Victorian 1875 - 1901. 

Jewelry pieces reviving ancient or period styles and techniques, Produced throughout the last half of the nineteenth century. 

Early to mid-nineteenth century design style featuring curved lines and shell, scroll and foliage motifs. 

Jewelry made during the reign of Edward VII, 1901 - 1910, that does not fall into the "Art Nouveau" or "Arts and Crafts Movement". 

A freeflowing curved revolutionary style of jewelry from the 1890's - 1910. Featuring delicate enamels and non-precious materials in the characteristic motifs of women with long flowing hair, bats, morning glories and dragonflies. 

An angular style of jewelry from the 1920's-1930's. Featuring Jade, black onyx and pave diamonds and even coral. 

Large jewlry from 1934 - 1945 set with citrine, topaz, or aquamarines. Typified by gold chains, chokers and brooches. Motifs: flowers, scrolls, ballerinas, animals, shells, birds, hearts, cupids and baskets of flowers.