void main()
{
    effect eVFX;
    object oSelf = OBJECT_SELF;

    // Get the creature who triggered this event.
    object oPC = GetLastUsedBy();

    // Abort if the PC does not have the item "alchymihammer" equipped.
    if ( GetItemPossessedBy(oPC, "alchymihammer") == OBJECT_INVALID )
    {
      FloatingTextStringOnCreature("You need a specific tool to mine this crystal !", oPC);
        return;
    }

    // If the PC does not have the item "focussplinter1".
    if ( GetItemPossessedBy(oPC, "focussplinter3") == OBJECT_INVALID )
    {
        // Give "focussplinter1" to the PC.
        CreateItemOnObject("focussplinter3", oPC);

        // Apply a visual effect.
        eVFX = EffectVisualEffect(VFX_FNF_ELECTRIC_EXPLOSION);
        ApplyEffectToObject(DURATION_TYPE_INSTANT, eVFX, oSelf);
    }
    else
    {
        // Have text appear over the PC's head.
        FloatingTextStringOnCreature("You seem unable to mine more splinters !", oPC);
    }
}