follow up question - is Zirconium like Quartz or does it go by other names sometimes ? I found following info about different terp beads / dab balls / whatever you want to call them
Zirconium is not in the list -
Borosilicate – Redefining the term “better than nothing”, clear glass Terp Beads are the most affordable option and offer the least heat retention but can still provide the added surface area and movement needed to more efficiently vaporize your oil. As with all boro glass, it can and will melt or change shape under intense heat – such as the direct, prolonged flame of a torch - so be aware of that when cleaning your Terp Pearls.
Ceramic – Ceramic Dab Beads or Terp Pearls offer decent heat retention, similar to quartz, and some argue, better flavor. Much like a ceramic dab nail, Terp Pearls made from this material can be hard to keep clean and are probably the most fragile of all the materials on this list. They cannot be torch cleaned as they will likely break. Allowing them to completely cool down is the safest way to keep them intact, making them hard to keep sparkling clean.
Quartz – If you are dabbing then you are probably pretty familiar with the pros and cons of quartz. Better heat retention and flavor representation are the two main reasons why your banger isn’t made out of boro, but out of quartz. They are also very resistant to thermal shock, so you can go straight from adab to iso with no worries of breakage. That being said, I would still wait for them to cool down a bit before submerging in any liquid as that will speed of chazzing. They can also be torch cleaned, but again, that will speed up chazzing.
Sapphire & Ruby – Lab grown sapphire and ruby Terp Pearls are known for their superior heat retention and optimal flavor delivery. Some care must be taken when cleaning gemstone Terp Pearls or Dab Beads. If they are still hot or warm, do not submerge them in iso alcohol as this could cause thermal shock and break or damage your Terp Pearl. Similarly, hitting it with the direct flame of a torch could cause shock the other direction, also risking damage or breakage. Like borosilicate, ruby Dab Beads or Terp Pearls can potentially even melt if put under enough sustained heat. Gentle heat, reliable tweezers, and a dry swab works best.
SiC –Silicone carbide has been used industrially for over a century, but its use in the dabbing scene came much more recently. Though they are more closely related to ceramic, these Terp Pearls look like metal and enjoy a similarly superior level of thermal/heat conductivity as well as thermal shock resistance. This makes them easy to clean with a torch flame, an alcohol wipe, or pretty much whatever method you want to use.
Shinju – Made from a ‘sophisticated high temp ceramic material’, Shinju Ceramic Terp Pearls offer the best of all worlds with insane heat retention and the ability to be torch cleaned back to like-new in seconds. The same material appears to be used to make high end chef’s knives, shinju blades stay sharper longer than steel, and that durability definitely carries over to Dab Beads and Terp pearls made from this super-ceramic. Unrivaled heat retention caps off the list of reasons why we love this type of Terp Pearl.
with the vi in all.
one with Boro (2mm) one with Zrc (3mm) is where I’m heading 
I as a rule have to have a second one just incase I break it, but in this case, like you said, it would be, for me, a WPA (hopefully the Madheaters one when it’s released) with 2mm Boro and then my native stem with a wooden sleeve and 3mm Zrc.