Question: Dolly Cohen has designed what piece of jewelry for Cara Delevinge?

Context paragraphs:
Jewelry model: A jewelry model is a master design that is copied to make many similar pieces of jewelry.  The model may either be a piece of actual finished jewelry or a low-cost blank fashioned from base metal.  In either case, the model is used to create the casting mold from which all subsequent pieces are made.

Estate jewelry: Estate Jewelry (or jewellery) is a term used, most commonly in a retail sense, to refer to jewelry and often timepieces which are part of the ‘estate’ of a deceased person.  More correctly estate jewelry is second-hand or pre-owned jewelry, with the ‘estate’ appellation signifying that the item is antique, vintage or an otherwise considered a significant or important piece.

Cara Delevingne: Cara Jocelyn Delevingne ( ; born 12 August 1992) is an English fashion model and actress.  She signed with Storm Model Management after leaving school in 2009.  Delevingne won the "Model of the Year" award at the British Fashion Awards in 2012 and 2014 and has appeared in shows for houses including Burberry, Chanel, Mulberry, Dolce & Gabbana, and Jason Wu.  She started her acting career with a minor role in the 2012 film adaptation of "Anna Karenina".  Her first major roles were as Margo Roth Spiegelman in the romantic mystery film "Paper Towns" (2015), Kath Talent in "London Fields", and the Enchantress in the comic book film "Suicide Squad" (2016).

Tragus piercing: A tragus piercing is the perforation of the tragus, which projects immediately in front of the ear canal, for the purpose of inserting and wearing a piece of jewelry.  The piercing itself is usually made with a small gauge hollow piercing needle, and typical jewelry would be a small diameter captive bead ring or small gauge post style piercing jewelry.  A related piercing is known as the antitragus piercing.

Aaron Loves Angela: Aaron Loves Angela is a 1975 American Soul Cinema Classic film written by Gerald Sanford and directed by Gordon Parks, Jr. This film stars Moses Gunn, Kevin Hooks and Irene Cara.  Both Cara and Hooks made early film appearances in this piece.  This is the final film that Gordon Parks, Jr. directed before his death on April 3, 1979.

Gemstone: A gemstone (also called a gem, fine gem, jewel, precious stone, or semi-precious stone) is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments.  However, certain rocks (such as lapis lazuli, opal, and jade) or organic materials that are not minerals (such as amber, jet, and pearl) are also used for jewelry and are therefore often considered to be gemstones as well.  Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value.  Rarity is another characteristic that lends value to a gemstone.

Dolly (tool): A 'dolly' is the name given to a category of tools used in shaping sheet metal.  In general, a dolly is a solid piece of metal, small enough to hold in one hand, with a curved or shaped face.  Generally a dolly will have more than one surface, each with its own radius of curvature (much like a three-dimensional French curve), allowing the craftsman more flexibility in using the tool.

Dolly Cohen: Dolly Cohen is a jewellery designer based in Paris.  She specializes in custom mouth jewellery and has created grill designs for Rihanna, Rita Ora, Drake, and Cara Delevingne.

Breast milk jewelry: Breast milk jewelry is jewelry made of a mother's breast milk as a keepsake often worn by the mother in various jewelry types such as rings, lockets, pendants and popular European style beads.  Pendants may include custom background colors, children's names and be made in many shape choices.  Some pendants may be bezel set, locket set, or made from just resin.  There are also filled styles available where a piece of jewelry, usually Sterling Silver is filled with preserved breast milk.  Generally the filled shapes are trees or hearts to represent love or life.

Bill Smith (jewelry designer): Bill Smith (born 1936) is an American fashion and jewelry designer who was the first black recipient of a Coty Award for his designs.  He has designed for a number of companies, including costume jewelry for Coro and Richelieu, leather goods for Mark Cross, and furs for Ben Kahn, along with designing jewelry for Cartier.

Supporting paragraphs: Dolly Cohen Cara Delevingne
Answer: grill designs