Nick Zimmer, jewelry designer, tennis pro My name is Nicholas Zimmer, jewelry designer and tennis professional. These disparate activities have come together in my life journey to form a mind body spirit connection. Along the way, I have been privleged to work with extremely talented tennis players and coaches... more


  Precious Mettle Jewelry from Nicholas Zimmer

The Trinity Pendant

The original trinity Pendant worn by Andre Agassi











The original Trinity Pendant
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The Trinity Pendant was originally designed as a religious piece for Kelli Bollittieri. Kelli is the wife of the man who is arguably the most famous tennis instructor in the world. Nick Bollettieri, founder of the Bollettieri Academy. Kelli has a deep Christian faith, and asked me to design a piece that symbolized her belief in Pure Eternal Love for the Father, Son, and Holy Spirit. She prized the trinity pendant, and soon asked me to make a matching piece as a gift for Andre Agassi, which he wore for many years. The original Trinity pendant and earrings continue to be powerful Christian jewelry.

My relationship with the Trinity has evolved. Today, the Trinity pendant has become a symbol of my strong belief in a wholistic health lifestyle. The triangle inside the rings represents the interplay of Mind, Body, and Spirit. That connection, and it's relationship with Holy Trinity of the Christian faith, are what gives the Trinity it's power.

Tennis Magazine Article on Andre and the Trinity Pendant

Andre Aggassi on cover of USTA magazine wearing Trinity Earring











Andre Agassi wore the Trinity
as a pendant and as an earring.
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The meaning of Precious Mettle

Slideshow In the 1990's Andre Agassi often wore a piece I designed as he made a dramatic ascendance in the rankings, to number 1, winning majors and becoming the most inspirational tennis player in the world. The story behind the Trinity Pendant and Andre's success while wearing it is a tale of mettle. Andre demonstrated his mettle publicly in his amazing late-career success.

I selected “Precious Mettle” as my company name because:

  • As a goldsmith and jeweler, I work with, respect, and value precious metal.
  • My Mettle (honor, integrity, honesty, sincerity) has always been very precious to me.
Life's challanges have recently made me acutely aware of how much my mettle means to me. As a young man I wore my mettle like a badge... or a shield. My mettle made me strong and decisive. It gave me the courage to face adversity and constantly seek new ways to use my gifts. My mettle kept me on the right path. For more biographical information, please continue to Nick's Biography.

I believe each of us has our precious mettle tested at various points in lives. The power of the sacred trinity of Mind, Body, Spirit keep us true to purpose, and maintains our precious mettle. My jewelry is designed to be a touchstone and witness, helping to remind us of the power of the Mind Body Spririt connection throughout the day, especially when our mettle is tested.

The Trinity Pendant that Andre wore is now available to the public. Each piece is hand made. I am happy to discuss custom features or color options. Trinity Options and Pricing

Mind Body Spirit Tennis

I currently offer tennis instruction in the Sierra Foothills, near Sacramento, California. My instruction philosophy is geared toward training the mind, and utilizing the entire body to improve tennis performance. My techniques involve utilizing "core" body musculature to increase shot velocity while improving accuracy.

Group and individual lessons are available for all skill levels. Seminars and group lessons can be conducted at your facility. More information on tennis instruction.