Women’s fashion deeply changed with the First World War (1914-1918). With the physical work made by the women in the place of men during the war, the corset was not worn. The hemlines and the sleeves began shorter and the women had short haircuts.
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
Women’s clothing during the First World War
In the 1920s, Fashion designers created clothes with light fabrics. Women wanted to feel freer in their movements and dismissed bulky long skirts and petticoats. The light fabrics, shorter and sleeker clothes were popular. Cotton, silk and rayon were the most used fabrics. At the end of the war, women didn’t want to go back to their old life and wanted to wear freer clothes. In the Parisian life, new fashion trends appeared like sleeveless dresses, short haircuts, pants, make up and accessories. 
Louise Brooks
Paris 1920s
Louise Brooks
Jewelry get adapted to these new fashion trends with more discreet, sober jewels. Platinum was used. The large floral brooches and dog collar necklaces disappeared because it was not anymore practical for the emancipated women. The new lifestyle implied different types of jewelry (less cumbersome and showy). Jewelry became geometric, graphic and sober. 
The elegant and freer clothes needed new types of jewelry. Women were more able to express themselves through their outfits and jewels. Sleeveless dresses, plunging neckline and short haircut allowed women to wear more jewels. In the 1920s, women had the flapper look (short haircut and freer dresses).
Louise Brooks
Paris 1920s
With light fabrics and sleeveless dresses, designers began to adorn women’s arms with jewels. Cartier invented the shoulder jewel.
Shoulder jewel by Cartier
Shoulder jewels by Cartier
The introduction of mittens encouraged jewellers to create rings (geometric, embellished with gemstones, carved gemstones…) and bracelets (often accumulated, multi-strand bracelets…).
Renée
Renée
Renée
Brigitte Helm???
Carole Lombard
Evelyn Brent, circa 1930
Renée
Renée
Carole Lombard
Greta Garbo
Renée
Carole Lombard
Paul Poiret revolutionized fashion ; he dropped the waistline to the hips and designed slit skirts allowing women to move and dance (tango, Charleston and Foxtrot). Fringe dresses were very popular. During the 1920s, women wore rings and bracelets. “Les années folles” designated the period between the end of the First World War and the economic crisis of 1929 in the United States of America. They also enjoyed smoking cigarettes, drinking cocktails, wearing make up…
1920s flapper dress
Vanity Fair December 1927, A. H. Fish
George Barbier
Cream silk satin dress with pearlq and beaded fringes, America, 1920s
In 1926, Gabrielle Chanel was renowed by Vogue with her ” little black dress”.
Chanel, 1926
At night, women adorned their hair with a hairband or a bandeau embellished with fine stones. They also wore low back dresses showing their necklace. The outfits and jewels changed depending on the hour of the day.
A spirit of freedom and renewal flowed. These new clothes allowed women to have leisure and sport activities (golf, tennis…). Women get access to sportive activities. Sportwear lines appeared ; Jean Patou designed dresses for the tenniswoman Suzanne Lenglen. The wrist watch became popular thanks to her.
Suzanne Lenglen
Jean Patou sportwear
Suzanne Lenglen wearing Jean Patou sportwear
Despite the emancipation of women, laws remained against them (law against abortion, no right to vote, social and work inequalities, dependence to the men…). Women were still considered as inferior towards men.
The new fashion needed new types of jewels such as the sautoirs and shorter necklaces worn on an open neckline.
Gloria Swanson
Claudette Colbert wearing Trabert & Hoeffer jewels, 1930s
Myrna Loy
Sautoirs (long and fluid long necklaces) were very fashionable. Pearl sautoirs were a must-have. The jewelry brand Técla was famous for its culture pearl necklaces. Coco Chanel promoted sautoirs namely pearl sautoirs including fake pearls.
Louise Brooks photographed by Eugene Robert Richee
Louise Brooks
George Barbier
George Barbier?
André-Edouard Marty
Coco Chanel
Chanel pearl sautoir
André-Edouard Marty
Necklaces and namely multi-strand necklaces flourished.
Joan Crawford
Gloria Stuart by Freulich, 1932
Bette Davis
The jabots (“a pin with a decorative element at each end connected by a metal rod hidden beneath the garment”), brooches and dress clips became fashionable. It could be worn on a hat, on a dress…
Louise Brooks
Dusausoy jewelry
Carole Lombard
Straw cloche embellished with a diamond brooch, 1931
René Boivin brooch (matt yellow gold, aquamarine and diamonds), 1930s and illustration of Robert Hope
Carole Lombard in “My man Godfrey”
Carole Lombard in “My man Godfrey”
Carole Lombard in “My man Godfrey”
Dress clips (“a type of pin that first gained prominence in the 1920s and were worn in pairs, often opposite one another on the neckline or straps of a dress”) were popular.
Carole Lombard
Carole Lombard
Carole Lombard
Carole Lombard
Bracelets adorned women’s bare arms ; it completed the outfit of women with a short hairstyle. Bracelet, cuffs and bangles could be accumulated.
Clark Gable and Carole Lombard
Jean Harlow
Norma Shearer
Jean Arthur
Katharine Hepburn
Jean Gabin
Jean Arthur
Jean Arthur
Louise Brooks
Jean Arthur
Danielle Darrieux
Bangles were often accumulated.
Renée
Renée by Jacques-Henri Lartigue, Paris,1931
Renée
Renée
Cuffs adorned women’s wrists.
Renée by Jacques-Henri Lartigue
They also often wore hats. Jewels could decorate their hats (brooches, hair pins…).
Carole Lombard
Carole Lombard
Jean Arthur
With the shorter hairstyles, long earrings became fashionable.
Jean Gabin, France
Myrna Loy
Eduardo Garcia Benito, May 1926
Norma Shearer
The Hungarian silent film actress (1898-1989)Lucy Doraine
Norma Shearer
Jean Harlow
Reynaldo Luza
Louise Brooks
Photo by Paul Tanqueray, 1930s
Jean Gabin, France
The stock market crash in 1929 caused deep changes even on fashion. In the 1930s, outfits changed ; the waistline was raised and the garments were more feminine. Clothes enhanced the shapes of woman body. Coco Chanel designed tailored suits for the day. In the evening, silence wore long dresses and shawls embellished with large brooches. Jewelry market wasn’t affected by the economic crisis of 1929. The voluminous ear clips, large bracelets embellished with diamonds were fashionable. Monochromatic jewels with white metals (platinum, white gold…) and with a large variety of diamond cuts were popular.
Bette Davis
Madeleine Vionnet?
Jean Arthur
Norma Shearer
Douglas Pollard and my pattern
Photo by Horst?
Photo by Paul Tanqueray
Douglas Pollard
In the 1920s and 1930s, it was allowed for women to wear makeup and to smoke cigarettes in public… New embellished objects (enamel, gold, fine stones…) appeared like minaudières (small evening bag), vanity cases, cigarette cases, compacts and lipsticks. Jewelers like Cartier and Van Cleef & Arpels designed these objects. Besides, modest women could own these objects thanks to less expensive materials like enamel, artificial stones, metal and plastic (bakelite and Galilite).
French minaudiere, 1925
Janesich minaudiere, Paris, 1925
Cigarettes were a symbol of freedom and glamour. Cinema movie stars used to smoke in movies. Smoking was very photogenic and cinematographic.
Jean Arthur
André-Edouard Marty
Marlene Dietrich
Clara Bow
Marlene Dietrich
Danielle Darrieux
Andreé-Edouard Marty
Make up accessories flourished : compacts (“cosmetic product. It is usually a small round metal case and contains two or more of the following: a mirror, pressed or loose face powder”), vanity cases, lipstick cases, embellished lipsticks, compact bracelets…
Joan Crawford
Life magazine
Vogue cover by Eduardo Garcia Benito, 1920s
Delineator illustrated by Helen Dryden, 1929
Life magazine
Erté?
Van Cleef & Arpels, enamel, sapphire and diamond powder compact
Jean Arthur
Compact bracelet
Compact bracelets
Sources : madparis, vanhoye, miller, theprucecrafts, Langantiques, Christies, thefrenchjewelrypost, https://www.nationaljeweler.com/articles/9502-the-history-behind-dress-clips, packlowegallery, medium nationaljeweler, gemselect. thefrenchjewelrypost, jewelryshoppingguix, primaveragallery, decolish, levysfinejewelry, richardjeanjacques, lagarconne, connectionsbyfinsa, history.house, schoolmouv, madparis, biarritzanneesfolles, alaintruong, histoire-image, https://mindalicious.fr/la-mode-des-annees-20-histoire-et-inspirations/, http://www.lesvisitesdemaud.fr/blog/la-petite-robe-noire and Pinterest