Crucible and Gemstone Mine?

[piperider361]

I was wondering if anyone had any extensive testing of using Gemstone Mines in addition to/instead of Cities of Brass in the various T1 decks utilizing Crucible of Worlds.  With the abundence of Crucible, having to reply Gemstone Mine a minimum of every 3 turns dosn't seem as bad as it did before.
I noticed one of the Gencon T8 Trinistax decks used 3x Gemstone Mines in addition to 4x Cities (also without any Volcanics/other duals) to the colored mana land sources.  This deck also ran four Crucibles maindeck.  While I'm sure the intent wasn't to recur Gemstone Mines, the possibility is there if necessary.
Could this be applied to 4cc?  One of 4cc's weaknesses, especially against aggro, is the abundant life loss before an Angel comes face-up, with CoB, Scrying, and FoW.  I'm currently running 2 maindeck Crucibles in my 4cc, and 1x Gemstone Mine/2x City of Brass, and it really seems to help out the mana curve.  I might even go up to three Crucibles.
Again, I stress that Crucible's main purpose should not be to recur Gemstone Mine.  Many people would rather recur Strips/Fetches, or just protect themselves from opposing Crucibles, but could Gemstone Mine start seeing decent play as a side effect?

[johnstown713]

The problem with that is you have to be running a lot of each card.  City of Brass is a reliable card and the life loss is usually counteracted by the positive effect it gives you.  But if you go into the Gemstone Mine - Crucible effect then you can have some dead cards.  Crucible tends not to stay in play that long due to it beinbg an artifact but if it does manage to stay than there are more useful cards with it, such as Wasteland and Strip Mine.  If you play Gemstone and don't draw Crucible then you eventually have a dead land card.  I don't think Gemstone Mine is needed and the manabase seems good enough.

Johnstown713

[VGB]

Gemstone Mine will see play in decks that want to run 3 or more colors and want Sundering Titan immunity, or run 3 or more colors and have a fundamental turn of 3 or less.  If your deck meets either of these criteria, then Mine beomes very attractive.

The fact that Crucible recurs Mines is really quite seldom a bonus.

[Plognark]

I ran them for a bit in my 7/10. THey did pretty well actually, but I was running a lot of odd-colored cards, like MD atifact mutation and also black for demonic and vamp tutor. I ran 4 of each (city and gemstone) and the mana base was amazingly smooth.
Even recurring a gemstone mine once was often enough, and the mana base was completely immune to the titan. It did pretty well.

Of course, back to basics kinda hurt