algorithmic modeling for Rhino



This group is obsolete, do not expect support here. Moved to the Peacock's server on Discord:


Generative Jewelry
 is a new discipline in 3d jewelry design which lets you create parametric jewelry, automate production, optimize costs, do much more with much less and create new shapes only possible with the algorithmic modeling and scripting. These tools allow you to create quickly and easily jewelry with Grasshopper :)

Current version: 0.99.1

Support Email:


Members: 137
Latest Activity: Jun 29

Group organization


If you need help using a component, or you need advice on how to do something about jewelry in Grasshopper, you can post a discussion in this group. Tutorials are coming.


These components may contain small bugs, are usually easy to detect the cause and fix them. Please, if you find any, notify me with the ghfile to
If you need the fixed component, I can send it if you ask me. Otherwise, the correction will be added in the next release.


If you think would be useful to change something of a component, you can notify me via email or post a discussion, for example title "Component prongs should have fewer inputs". Consider whether you need to open a discussion or better send me an email.

New components.

If you have an idea for a new component, you can post a discussion in this group. It may be just a wish or be accompanied by a proposed definition. If you do not want to publish the content of the definition, have a private discussion with me via email.

To propose new components, we should follow rules. At the beginning of the title of the discussion, you should put "NCP -" (New Component Peacock)


If you want to participate in the development of Peacock, must share with me via email three new useful components. I reserve the option to choose collaborator. These components will be owned and have their name while 50% of the original script is not modified.
Being developer supposed to know the password of all components. Personally, I would rather share the components as open, but I need to custody my work for now.

Discussion Forum

Custom Oval Stone Size In Gem Studio

Hello,Can anyone help me with getting a custom size for an oval shapped stone. Im using the GemStudio button and when I enter two numbers for the size, I just get two stones.  I need my stone to be…Continue

Tags: gem, oval, gemstudio, peacock

Started by Jean-Mattis Bourgault Jun 29.

Pave component dependencies 1 Reply

The "Pave Random" component mentions that it requires Kangaroo to run in the menu tooltip; both Rhino6 and Rhino7 come with Kangaroo pre-installed. When I drag the component to the canvas, I get an…Continue

Started by Joshua Edelstein. Last reply by Joshua Edelstein Dec 23, 2020.

Using gem cutter 1 Reply

Hello, I cannot seem to be able to use the gem cutter tool properly. Ive tried to use it but nothing happens. Can someone explain to me how it works or give me some tips on how to use it?ThanksContinue

Started by Jean-Mattis Bourgault. Last reply by Wonseok Chung Oct 7, 2020.

Peacock with Rhino 5 Mac 4 Replies

Hi!Who have Peacock working on Rhino 5 for Mac?I have install it but most nodes are not working. For example Gem Studio doesn't generate gems and many-many other doesn't work.I have OSX Mojave.Continue

Tags: Rhonoceros 5 Mac, Mac, OSX

Started by Sergey Radovsky. Last reply by Sergey Radovsky May 4, 2020.

Comment Wall


You need to be a member of Peacock to add comments!

Comment by Daniel González Abalde on January 24, 2016 at 7:50am

Please add a discussion for consultations.

Hi Sandra,

as you can read on Size_param description or in the component description, the current release uses European Gauge (in all rings components). This is Radius = (size+40)/(2*Pi), where "size" is the value to give, it's usually used in countries like Spain, Italy, Netherlands, Switzerland... The next release will have 6 ways (5 regional system + diameter) to give it the size in different regional systems with just two clicks, in fact, the rings of the next release are already developed, but will have to wait...

Knowing that:

ISO (International Organization for Standardization). mm of internal circunference. Austria, France, Germany, Belgium, Scandinavia...

radii = Size / (2 * Math.PI) 

European Size. Spain, Italy, Netherlands, Switzerland...
radii = (Size + 40) / (2 * Math.PI) 

British Size. United Kingdom, Ireland, Australia, New Zealand, South Africa...
radii = ((Size * 0.4) + 11.5) / 2

American Size. United States, Canada, Mexico...
radii = ((Size * 0.83) + 11.54) / 2 

Japanese Size. Japan, China, India, South America...
radii = ((Size / 3) + 12.67) / 2

Diameter Size. Many goldsmiths anywhere.

radii = Size / 2


and since this release are UserObject componentes, you can remplace if you want the Size component with one new. For example, right clicking size_param, going to Expresion and setting x*pi-40, the size input will be the diameter of the resulting circle, if you give it a value of 14, the circle will have a radius of 7. Then save the userobject (File>Create User Object) and remove the other.

Or create a new one, since this component is just a rotated circle and a cylinder.

Hope this helps.

Comment by Sandra Bornemann on January 24, 2016 at 6:07am

I have just started playing with the plug-in. Seem to have difficulties with the 'size'-function. What is the actual reference point for the ring-size? It does nit seem to match neither mm measurements nor American ring-sizes...please help

Thanks a lot


Comment by Randy Gregory on April 1, 2015 at 10:02am

I just started playing with Peacock. I do production jewellery, mostly 925 silver and I use a lot of Swarovski crystals in enamel. I have tried to use your pave and twice it crashed. What I am wanting is to fill a predetermined area with crystals of specific sizes. Also looking at Kangaroo for circle packing. 

Best way to use pave. I have only played with your sample file. Thanks

Comment by Martin van Oene on March 4, 2015 at 1:15am

Thanks Daniel for sharing

Comment by Daniel Martinez on February 23, 2015 at 11:07pm

but of course ::facepalm:: Thank you so much Daniel!

Comment by Daniel González Abalde on February 23, 2015 at 4:58am

Hi @Daniel Martinez.

Sorry for the password protected. You can redo the gem with Gems component, which has parameter to flip the stones as you wish.

Comment by Daniel Martinez on February 23, 2015 at 12:17am

@Daniel González Abalde can you flip stone while using the pave definition? I try to open the cluster to see if I could gain access to the gem component which assuming is there in some form, but is password protected :(

I'm working with surfaces that transition from concave to convex and this will allow me to use the definition on them.

Comment by Gianni Nicola on January 16, 2015 at 3:51am
hello, I'm new to grasshopper and is taking me so much , the plug-in peacock and fantastic , I hope that soon there will be some tutorial , because there are few things that I can do . sorry but the English use a translator
Comment by Sam Ng on January 11, 2015 at 10:56am

hi Daniel,

Is there any tutorial about how to use Peacock? I am very interested in generative jewelry!!

Comment by Ethan Gross on January 3, 2015 at 7:48pm

Works! Thanks Daniel.


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