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Speed of Light Necklace

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The speed of light is a fundamental constant of the universe. It represents a core principle of physics, astronomy, and our understanding of reality. Meter by meter and second by second... whatever your goals are, may light to inspire you to push forward and give your best!

This pendant measures 1.5 inches in length and is made from platinum or gold-plated steel. It comes on a sterling silver or gold-plated chain, in your choice of a 16 inch or 18 inch length. Choose 16 inches for a short, layering-style necklace, or 18 inches for a standard-length necklace. [As a note, we asked an ultra-marathoner friend to try it out for us... She reported it to be both sturdy and so comfortable she forgot she was wearing it.]

Perfect for:

  • Astronomers, physicists & science enthusiasts
  • Runners & athletes
  • Ambitious, high-energy achievers of all kinds

Customer Reviews

Based on 6 reviews
The speed of light

This necklace has the speed of light in a vacuum expressed in meters/second.

The finish of the necklace is very good and my niece who is at university loves it.

...still didn’t receive it

Tracking: its still in LA since Jan. You did your part in sending out the order almost immediately, but covid-chaos is the impediment I imagine. I’ll be happy to review - I’m sure it’s beautiful. Hope all’s well at you end😘

Gorgeous! And I received it ultra-fast

I wish every company you make purchases from on the internet offered the same experience. But then Boutique Academia would still find a way to outdo itself.
My necklace is darling. I wear it all the time. I haven’t worn it in the shower as I know better but it is easy to forget it’s on my neck, since it is so comfortable.
The only thing I wish is that they offered a Rose Gold option. 99% of the jewelry I wear is rose gold (rings, earrings, bracelets) so I’d get a rose gold necklace of the same kind in a heartbeat.
However, that’s my personal preference and clearly it hasn’t prevented me to adapt for sake of wearing something special.
If you’re on the fence about your purchase, go ahead fearlessly, their system will notify you of every step along the way! Even when your item is already in the mailbox. Bravo!!!!!!

Speed of light Necklace is so worth it!

I love this simple bar necklace. I love to wear my geekiness understated at times, and this is such a great way to do that! It's the perfect size, it's clear to make out, and I just freaking love it! I haven't seen anything else like this online, and the gift box was so fantastically cute. Definitely will purchase more from this shop.

Wonderful and beautiful

I have received many compliments on the jewelry I ordered from here. I love it and will order again soon!


Order by Dec 15 with First Class shipping or by Dec 16 with Priority Mail shipping for delivery before December 25 within the United States.

For last-minute shoppers: gift certificates are always a great option! If you don't want it emailed directly to the recipient, enter your email as the recipient and print out the document when it arrives in your email. Wrap in a nice envelope and voila!!


FREE SHIPPING for orders over $45 within the United States. Buy several items-- keep some and give others as gifts! If you don't quite hit the $45 total, First Class delivery within the U.S. is $3.50 per order, and Priority is $6.50 per order. Gift boxes are ALWAYS included for orders within the U.S. Unless otherwise stated above (near holidays), your order will be processed and mailed within 2 business days. (Near holidays, we often mail out same-day.) 

 UNITED STATES mailed withinin transit for from ordering to arrival 
 Priority Mail  1-2 business days  2 - 4 business days  3 - 6 business days 
First Class  1-2 business days  3 - 5 days  4 - 7 business days

We do not currently ship to the European Union. For all other countries outside the United States, USPS First Class International shipping without gift boxes is $8 per order. Please note: USPS First Class International shipping can take a very long time to arrive, averaging 4 - 12 weeks, depending on the country. USPS tracking numbers will work only until the package leaves the United States. We will replace packages that go missing before exiting the US border, but cannot replace packages that disappear after that.

The customer is responsible for any VAT or import tax charges.


We are so sure that you (or your lucky gift recipient) will love our jewelry that we have a 100% Satisfaction Guarantee! If you are unhappy with your order for any reason, even if you just decided it wasn't your style after all, simply mail back your undamaged, unworn jewelry and we will give you a full refund minus shipping. Check our reviews... our goal is to get ALL THE STARS. If you have any kind of problem with your order, please email us at maile@boutiqueacademia.com. We want all of our customers to be completely satisfied!