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Creative Metal Forming

Cynthia Eid has been hammering and forming metal for over 45 years and has co-written the book Creative Metal Forming, with Betty Helen Longhi.

In this in-depth 3-day workshop, students will join Cynthia as they explore synclastic forming, anticlastic forming, and spiculums, while learning to hammer comfortably and with control. Participants can expect to create concave and convex curves that transform a flat piece of metal into elegant fluidity through domed synclasts, saddle-like anticlasts, and tapered tube spiculums. 

Emphasis will be placed on the jewelry scale during this workshop to save time. The first day, students will make a synclastic bracelet and bead.  The second day will focus on an anticlastic bracelet in the morning and anticlastic earrings in the afternoon. On day three, we will make straight spiculum(s) in the morning, and then close one of the anticlastic earrings into an open seam spiculum. After each demonstration, there will be a period for practice, with the instructor available for questions.

A kit of hammers, stakes, and metal will be provided for each student to use during the workshop.  At the end of the workshop, the tools may be purchased or returned.

If you'd like to see more of Cynthia's work, please visit her website at www.cynthiaeid.com.

Please click and read the Materials & Tools tab below, which outlines important supply information!

Meet the instructor

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Whether using hammers and stakes, or hydraulic press tools, Cynthia's sculptural jewelry and hollowware shows her focus on exploring the fluidity with which metal can be moved, formed, and joined.

Cynthia Eid co-authored the book Creative Metal Forming, with Betty Helen Longhi, published in 2013 by Tim McCreight's Brynmorgen Press. In his foreword for the book, Michael Good says the authors "have succeeded in assembling the first comprehensive textbook on synclastic and anticlastic forming." (More about the book available at www.creativemetalforming.com.)  

Cynthia and Betty developed a set of anticlastic stakes, and Eid also works with Knew Concepts and Bonny Doon to help make tools for jewelers and metalsmiths. Lee Marshall has dubbed Cynthia Eid "Godmother of the Knew Concept Saws" since it was her idea for him to produce these saws for jewelers.

Excited about working in sterling silver without the problem of firescale, Cynthia has been working with Argentium Silver since 1999. After meeting Peter Johns (the inventor of Argentium Silver) in 2003, Eid has participated in AS's development. Argentium International, Ltd recognizes her as a Pioneer.

Cynthia Eid's metalwork has won awards for creativity and design, been featured in many publications, and been exhibited internationally. With a BS in Art Education and MFA in Jewelry, Design, and Silversmithing, she has previously worked as a bench jeweler for fine goldsmiths, a model-maker in a gold jewelry factory, and on private commissions. Her work is in museums in the US and UK. Currently an independent metalsmith and educator, she teaches weekly classes at Metalwerx in Massachusetts, and workshops and short courses in the US, Canada, Europe, and Australia.

Materials & Tools

There is a $8 materials fee for this course which is payable to Metalwerx upon registration. The materials kit fee covers 2x4 blocks of pine, 3% peroxide, clear tape, masking tape, maroon scortchbrite pad, and other miscellaneous consumables needed for workshop objectives.

There is a $25 estimated materials fee for an instructor provided materials kit which is payable directly to the instructor during the workshop. The materials kit fee covers all metal needs for the student.

A kit of hammers and stakes will be assembled by the instructor for each student. Students may choose to purchase any that they wish, at the end of the workshop. A $40 fee will be payable to instructor during the workshop for use of the tool kit (helps cover shipping, loss, and damage). If $250 or more in tools are purchased by a student, their $40 tool kit fee will be cancelled.

  • 1 x LH-1 synclastic hammer

  • 1 x LH-4 cross-peen hammer

  • 1 x LH-4.5 cross-peen hammer

  • 1 x LH-5 cross-peen hammer

  • 1 x Fretz Ultimate Spiculum Hammer

  • 1 x Fretz MKR-1 planishing hammer

  • 1 x small Eid/Longhi anticlastic stake

  • 1 x medium Eid/Longhi anticlastic stake

  • 1 x large Eid/Longhi anticlastic stake

  • 1 x NC Black large spiculum block

  • 1 x Large round bur (~9mm diameter-to be used to carve depressions in pine)

  • 3 x NuGold sheets: one each of 20, 22 and 24 gauge - 6" x 6"

  • 1 x soft plastic vise jaws

  • 1 x trailer hitch ball

  • 1 x Bonny Doon 10 oz urethane hammer

  • 1 set of inserts for Bonny Doon hammer

Students should bring
  • steel ring mandrel - not marked all the way around or unmarked (Contenti)

    • each student will need one, and the studio does not have 12 in good condition

  • #2 half-round file for filing edges of metal

  • fine point permanent marker

  • hammers and stakes that you already have

    • you and the instructor can evaluate their usefulness for techniques taught in workshop

  • studio apron

  • studio towel

  • notebook or sketchpad

  • pen or pencil

  • closed-toe shoes - required in the Metalwerx studio

  • lunch - Metalwerx has a fridge, toaster oven, and microwave



  • 20g, 22g, and/or 24g Argentium silver or traditional sterling if student prefers to work in silver

  • copper or fine silver if student will want to enamel

  • roll-printing materials if you have

  • optivisor or the equivalent


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