Onyx is a Gem!

There aren't enough nice things to say about this toy, as long as you know what you like when it comes to anal play. The versatility it brings to the table makes me think that anyone who can handle the material and size should give this one a try!
Rating by reviewer:
extremely useful review


The Onyx Prostate Massager is a toy that can be used by men or women. For men, prostate stimulation can lead to stronger, deeper orgasms than penile stimulation alone. Prostate massage can also, perhaps, lead to the ability to have multiple orgasms. This toy has the ability to be used as a plug, where it is inserted anally and then left there during intercourse or other play, or it can be used as a probe, where you or your partner thrust the toy. For women, this toy can stimulate anally alone, or, if left in place anally while you enjoy vaginal intercourse, the toy will provide additional stimulation. It's a large enough toy that it can be used for vaginal stimulation as well, either by thrusting it or using it to provide concentrated G-spot pressure.

No matter who makes use of this toy, they could choose to use it as a plug during solo play, or thrust the toy into themselves during solo play. As always, be very careful when thrusting glass toys, as they have no give.

Glass is a great material for temperature play, but caution should be taken when combining temperature play and anal play, as the sensitive tissue involved can be easily injured by extreme hot or cold.
  • Who / How / What
    [ ? ]
    Who might this product be best for? How is it best used? What are the best circumstances or situations for using this product?
    • Couples
    • Everyone
    • Solo
  • Where
    [ ? ]
    Where / what types of places can this product be used?
    • Anywhere
  • Features
    [ ? ]
    What kind of features does this product offer?
    • Travel friendly
  • Body / part areas
    [ ? ]
    What areas on the body can this product be used / what areas does it stimulate best?
    • Anal
    • G-spot
    • P-spot

Material / Texture

Made of borosilicate glass, the Onyx Prostate Massager is nonporous, hypoallergenic, nontoxic, latex-free and phthalate-free. It has no smell or taste. Borosilicate glass is better known as Pyrex, the bakeware and dishes popular in kitchens the world over. As this toy is glass, it is firm and rigid, but no bend or flex. The surface is very smooth and it doesn't collect lint or hair. Because of the firmness of glass, it's important that you move slowly and listen to your body to prevent damage to sensitive tissues. There is no textural component to this toy aside from the two bulbs at the end, which allows for comfortable insertion and wear.

The ring handle is clear glass, but the rest of the toy is a very deep black colored glass, which you cannot see through at all. It gives the toy a very rich appearance, with a naughty element, and is sure to match love of lingerie.

Design / Shape / Size

Measuring at 6 1/2" in length and 1 1/4" at it's widest point, the Onyx falls somewhere in the intermediate category in terms of anal play. The insertable length falls roughly around 4 1/2". It isn't extremely wide, but isn't a beginner toy. Working up to the Onyx shouldn't be an issue for most anal players.

The bulbs measure 1 1/4" each, and they are fairly uniform. Your item may vary slightly, as is the case with glass toys. The gentle curve of the toy really helps to make it comfortable to use in various positions. When inserted anally, you can move around and change positions without feeling as though it's jabbing you internally.

For those that don't enjoy phallic looking anal toys, this is a great anal toy choice. It's beautiful, and functional, but it doesn't scream "phallus." That being said, if you left this out on your table or nightstand, people would certainly be able to guess what it was.

The ring handle is certainly wide enough to ensure that this toy isn't being pulled too far inward, and it's easy enough to use when maneuvering the toy. It wouldn't be comfortable for sitting or long term wear, as it does stick out a bit.
    • Beginner
    • Ergonomic
    • Partner play


As glass has no flex or give, a warm-up is necessary for the Onyx for most, if not all, anal players. This toy doesn't allow for the most gradual insertion, as it starts out with the first bulb immediately. That bulb is tapered slightly, but not much. As it moves directly into another bulb with little to no space for rest, it's important to know your body and what you like in an anal toy before trying the Onyx.

Once you move past the two bulbs, the neck does taper and is very comfortable. If you enjoy just placing a plug and leaving it, after the rush of an initial penetration, the Onyx is great for that. If you can handle the Onyx's size, and like the intense massage that the two bulbs will provide when they are moved in and out or you clench your muscles around them, the Onyx is a great toy for you as well. There are many ways this one can be enjoyed, and it excels at each. It's simply a matter of knowing what you like before you purchase. If you need a gradual taper to insert a toy, or you like a bit of give with your anal toys, the Onyx isn't going to satisfy.
    • Comfortable
    • Easy to use

Care and Maintenance

Cleaning the Onyx Prostate Massager is easy. You can wash it with soap and water, or you can use your favorite toy cleaner. It can be sterilized by placing it in boiling water for three minutes, or washing it in your dishwasher. Because it is a glass toy, you can use any lube you like.


The Onyx Prostate Massager comes wrapped in bubble wrap, within a plain red storage pouch, as you can see in the picture. For storage, be sure to avoid storing it up against other glass toys, or anywhere it might bang against anything which would break it. No instructions, care information or paperwork came with it. It is pretty self-explanatory.


This is a toy that can be sterilized between uses and shared between partners, male and female alike, which is a rare find in the sex toy world. If you have limited resources and want a toy that will do a lot of jobs well, this is a good choice.
This product was provided free of charge to the reviewer. This review is in compliance with the FTC guidelines.

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  • Contributor: Rossie
    I love the onyx look, but wish it has an oval handle like njoy's Pfun plug. Thank you for the great review!
  • Contributor: charmedtomeetyou
    Rossie - they must be harder to make in glass, because you rarely see any handle but the basic ring.
  • Contributor: Rossie
    I guess it takes a lot more effort to shape an oval handle. The toy might also be costlier because of the additional work.
  • Contributor: charmedtomeetyou
    I agree -- it must be for ease in making the toys uniform, or for cost reasons. An oval would be nicer. I wonder if an oval would be more prone to breakage?
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