The ore mineral assemblage of Dayishan wollastonite deposit is complex being composed of wollastonite, diopside, idocrase, k-feldspar, albite, calcite and quartz.

大义山硅灰石矿床矿石矿物组合复杂，由硅灰石、透辉石、符山石、钾长石、钠长石、方解石、石英等组成。

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Ask in advance if an ETF will generate a standard 1099 tax form or the more complex K-1.

WSJ: BlackRock Wants Some ETFs to Be Sold Under a Different Label

Instead of getting a simple 1099 dividend form, MLP investors receive a more complex K-1 filing with varying degrees of tax deferral and sometimes even taxable income in multiple states.

FORBES: Magazine Article

Our experience would confirm this. 401(k) record-keeping is exceedingly complex.

FORBES: 401(k)s: Far More Dangerous Than IRAs (March 2, 2001)