Lapidary Base Material Requirements

[Kinni]

construct jewellery bracelet tin ruby
You do not have enough base material to make that.

<100%hp 0m 100%mv>
inv
You are carrying:
a silvery black sack (perfect)
a piece of parchment (perfect)
a quill (perfect)
a platinum bound jewel chest (perfect)
a large black leather ore bag (perfect)
a travellers pack (perfect)
( 2) an average-grade ingot of tin (perfect)
a star ruby (perfect)

<100%hp 0m 100%mv>
get 'average-grade ingot of tin' bag
You get an average-grade ingot of tin from a large black leather ore bag.

<100%hp 0m 100%mv>
get 'average-grade ingot of tin' bag
You get an average-grade ingot of tin from a large black leather ore bag.

<100%hp 0m 100%mv>
inv
You are carrying:
a silvery black sack (perfect)
a piece of parchment (perfect)
a quill (perfect)
a platinum bound jewel chest (perfect)
a large black leather ore bag (perfect)
a travellers pack (perfect)
( 4) an average-grade ingot of tin (perfect)
a star ruby (perfect)

<100%hp 0m 100%mv>
construct jewellery bracelet tin ruby
You ruin a star ruby trying to make jewellery.
You ruin an average-grade ingot of tin trying to make jewellery.

construct jewellery bracelet tin ruby
You ruin a star ruby trying to make jewellery.
You ruin an average-grade ingot of tin trying to make jewellery.

<100%hp 0m 95%mv>
You finish lapidary.

<100%hp 0m 95%mv>
inv
You are carrying:
a silvery black sack (perfect)
a piece of parchment (perfect)
a quill (perfect)
a platinum bound jewel chest (perfect)
a large black leather ore bag (perfect)
a travellers pack (perfect)
( 2) an average-grade ingot of tin (perfect)

Starting off with two ingots, it indicates I don't have enough raw material, but it takes only two ingots to make a bracelet.

[Raona]

The problem here will be that the apparently same-grade ingots of tin actually don't work together. If you drop all the tin ingots, then pick up the two you need (or possibly all of them) with
GET 2 INGOT (OR GET ALL.INGOT)
I think you will find it works...please let me know if it does!

This is a longstanding oddity that we are still working around rather than spending time on fixing.