Good reference book or website for crystal/glass manufacturer’s markings?

Hi: Do you know a good source of information concerning manufacturer marks for vintage, antique, and current brands of crystal and glass? Thanks!

A good source is not the problem, you is the problem

Vintage Costume Jewelry – Vintage Crystal Rhinestone Brooches And Pins

Sweet Romance Marcasite Vintage Crystal Medallion Bracelet $32.79 The rosette medallion has been delicately mille-grained and accented with marcasite and suspends from a large rope ring. Double chain fastens to rope ring with over-sized lobster claw clasp.

Sweet Romance Vintage Crystal Victorian Flower Bracelet $32.49 A bracket of jewels and scrolled arabesques are mounted atop a delicate oval hardwire bracelet. Finished in 14K gold with accents of smoke crystal and seed pearls.

Sweet Romance Vintage Crystal Nautical Chain Necklace $44.99 Open links with smoke crystal accents set off this stunning chain necklace. The etched oval links are sculpted into a twisted nautical style. This jewelry piece is signed by the designer.

Sweet Romance Vintage Crystal French Perfume Label Bracelet $49.99 Miniaturized French beauty product labels are encased under clear enamel and framed by a palette of pastel Swarovski crystal and seed pearls. Alternate links are delicate wildflowers softly colored in blended enamels.

Sweet Romance Edwardian Vintage Crystal and Seed Pearl Necklace $49.99 Every detail of this wedding-style necklace transmits the luxury of Edwardian jewelry, including Swarovski crystals and seed pearls. This necklace is crafted of bronzetone pewter with a delicate rolled scroll-style chain.

Sweet Romance Pewter Vintage Crystal and Faux Pearl Vine Necklace $69.99 Classic glamour of the late 1940’s decorates this Sweet Romance necklace, with a continuous vine of glass pearls or crystals. This necklace is available in your choice of goldtone with glass faux pearls or silvertone with clear Swarovski crystals.

Sweet Romance Pewter Victorian Faux Pearl or Vintage Crystal Earrings $29.99 Elegant and versatile, these earrings from Sweet Romance are crafted of pewter with push-back clasps. The earrings are available in your choice of goldtone with Victorian faux pearls or silvertone with clear Swarovski crystals.

Sweet Romance Vintage Crystal or Faux Pearl Vine Earrings $34.99 The glamour of the late 1940’s adorns these Sweet Romance earrings with a graceful vine formed of marquise-shaped stones. This fashion jewelry is available in your choice of goldtone with faux pearls and crystals or silvertone with Swarovski crystals.