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$ 24.99
Avogadro's constant: "the number of elementary entities per mole of substance". It's a big number...which is to say, there's a lot of stuff in the universe. Wear a piece of it with this hand-stamped tie bar.
Available in aluminum or bronze, it is sturdy enough to last a lifetime. (Note that hand-stamped lettering varies a little, so yours will be charmingly unique.)
Perfect for:
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 within | in 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!
I ordered two necklaces for my wife and their quality was great, she liked them very much. Also the shipment and delivery to Europe where I live was fast
I have searched for science themed jewelry and have purchased several items from Boutique Academia. I have loved all of the pieces! Great quality and design!
I love these, though they are a little heavy which makes my ears sore if I wear them all day. Interestingly, they freak out my autistic son who, as soon as he saw them, complained that they are both the same hemisphere.
Sent these to my cousin who is a teacher and math lover, and she was so excited! they are beautiful!
I was really surprised and impressed by the incredible selection of truly unique jewelry offered by Boutique Academia. My niece is a star student, and math is one of her favourite subjects, so the gift was a hit. Now I'm officially the 'cool auntie.' Great experience all around!
It was delivered promptly, was exactly as expected, and looks pretty.
Amazing customer service and beautiful products!
Their jewelry is the most unusual and unique on the market. The science themed pieces are amazing. I purchased the EKG rhythm one (since I tend to have heart rhythm issues) and my doctor took a minute then asked if it was an EKG segment. The other piece was a beautiful globe with binoculars. Very unique and I know it will get a lot of compliments. I received the order timely and the company communicated excellently. I'll be scouring their site for more - I just noticed the Mobius Pendant.
Their jewelry is the most unusual and unique on the market. The science themed pieces are amazing. I purchased the EKG rhythm one (since I tend to have heart rhythm issues) and my doctor took a minute then asked if it was an EKG segment. The other piece was a beautiful globe with binoculars. Very unique and I know it will get a lot of compliments. I received the order timely and the company communicated excellently. I'll be scouring their site for more - I just noticed the Mobius Pendant.
I'm a huge fan of this necklace - the design is gorgeous, it's well made as far as I can tell, and international delivery worked without any issues. The only thing I wish was different is if there was a heavier, sturdier version for guys like me. It would be great to have a few more masculine designs available in the store. :)
I searched for a unique gift for my daughter who is a chemical engineer and found these. They are quite beautiful, she loved them. The customer service was excellent and shipping was super fast and I have recommended the store to others -
already choosing a birthday gift for myself. Boutique Academia is a real find if you are seeking a gift for your grad.
Bought the DNA necklace and the Binary Love necklace as graduation presents. Both are beautifully made pieces and look far more expensive than they are. Both the recipients were thrilled with their present. Glad to have found this online store...will surely buy from here again.
As a math teacher, this was the best present to myself after this very crazy pandemic year!
I love the Atomic necklace. New favorite piece of jewelry.
