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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 | 1 - 3 business days | 2 - 5 business days |
| First Class | 1-2 business days | 2 - 4 days | 3 - 6 business days |
For all countries outside the United States, USPS First Class International shipping without gift boxes is $6 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 have purchased several necklaces from Botique Academia. All of them are top quality, and have a great "feel" on my neck. The Acorn Necklace is the heaviest and largest of the assortment I have purchased. The chain is just the right weight to hold it, and the acorn pendant is unique and fun to wear.
Looks very nice and is good quality, I wish the necklace itself was not as long, but overall pretty happy. Would recommend👍🏻
Pendant is fine and what I expected, however very disappointed that the necklace is broken after wearing for a week.
Beautiful set! My "science teacher" daughter will love them!
I purchased the Lapis Lazuli necklace as a gift, and the quality of this piece is outstanding. I am sure the recipient will love it.
Beautiful! It is really stunning, and will be a perfect present! And the beads move so it can work!
I saw this necklace online and fell in love with it! It was out of stock and I had to wait 9 months, but it was worth the wait! It is even more beautiful in person than in the photos. (When it was out of stock, I asked to be emailed when it was available again. Boutique Academia was faithful and emailed! I ordered right away!) Very happy!
We have been waiting for this to come back in stock and it did not disappoint.
Whenever I'm looking for unusual, inspiring jewelry for gifts for my friends, I always come to Boutique Academia. I love their designs, the craftmanship is top notch and most importantly, there is inspiration in every piece which makes for a meaningful gift.
and she received many compliments about it from her peers
I recently ordered the Fibonacci necklace for my wife. She absolutely LOVES it! Boutique Academia made the whole process very easy & I will definitely order from them again. Service was very prompt and courteous, shipment arrived in a very timely manner and the quality is top-notch!
As a scientist and a nerd, I bought two earring sets, one of the Fibonacci Sequence and the other Particle Physics. I love them both. They are made well, and people keep stopping and commenting on them. So unique! I wonder which piece I'll get next. (-:
Really love this company and will definitely order from them again. Great customer service, fast order processing and delivery. VERY happy with both meaningful necklaces, Orion and Aries, that I bought.
It is so pretty! People notice and comment on my necklace whenever I wear it.
My girlfriend and I are great fans of the Tardigrade. She was thrilled to get such a great pendant of our tiny hero. Thank you Boutique Academia!!!
I love the Black Hole Necklace! It is so awesome to have a piece of history to wear. It is very distinctive.
I was thrilled to find Boutique Academia which has an amazing collection of unique jewelry reflecting the beauty of our biology and environment. Good and responsive service as well!
A five star rating well deserved... Boutique Academia provides a great and efficient service and the Tardigrade necklace I bought, without any problem, is as beautiful as I thought... Love the concept !
i got several constellations that i know exactly fit each of my friends. fantastic find. i'm very pleased with the results.
I bought this necklace for my daughter who has a PhD in neuroscience. It ties in wonderfully with her research.
Serotonin, Dopamine, & Acetylcholine Necklace
i am a biologist who works as a chemist with a sister who is an engineer. I love finding jewelry and key fobs that represent what i do. i have been sharing the business cards that came in the box with each item with fellow STEM women. They are also rather geeked about this. YAY! it it about time someone did this!
I bought a Serotonin+dopamine+acetylcholine necklace for our colleauge when She stopped workin in our company. It is so lovely and she really appreciated it.
Just love the earth from moon earrings--always one of my favorite pix--I have it on the wall at home--now I can wear proudly on my ears!!!
Necklace was exactly what I was looking for -- very well made, chain was perfect length. Seemed like I received it within 48 hours of ordering... I think that's right. Anyhow, many thanks!
My wife is the head of biology at a biotech company, and she squealed in delight when she opened this. She has already worn it several times in the last two weeks and her colleagues have loved it too.
I bought this for my author friend as a graduation present and she loves it! It's so unique, pretty and well made.
This necklace made a great gift for a recent grad and budding neuroscientist! Item arrived quickly and was as pictured; good size, quality, and detail.
Looks great. I bought it for a gift... but might keep it!
i love this necklace. it's beautiful and nicely weighted. so happy with it!
Love both pieces. My students really think I am a science geek now.
I absolutely loved the key chain. The craftsmanship was wonderful and shipping was fast.
The pendant has a nice weight to it, and it's the perfect size. Orion was the first constellation I was able to identify, and it remains my favorite. Very pleased to be able to have it near me even when it's no longer in the night sky.
Love it. Decent weight,good quality chain, appreciate the cristae, worn it every day since I got it.
