What does marcasite mean?

marcasite (noun): The orthorhombic form of iron disulfide, FeS2, occurring as yellow crystals. As a hashtag, #marcasite carries this topic across social platforms.

How popular is #marcasite?

#marcasite has no measured public activity on the open social web in the last 7 days. It is currently wide open.

What hashtags are related to #marcasite?

No related hashtags with measured usage were found for #marcasite.

How much does it cost to own #marcasite?

#marcasite is available as a #name from $51.02 per year. You can claim it by card at https://hashtag.org/checkout/portal-name?name=marcasite or with tokens on hashtag.space at https://hashtag.space/#marcasite.

#marcasite

Name: #marcasite — a #name on hashtag.org
Brand: hashtag.org
Price: 51.02 USD
Availability: InStock

Live, measured metrics for the hashtag #marcasite from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #marcasite

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$51.02/ year · 9-character #name

Claim #marcasite — $51.02/yr→Buy on hashtag.space (web3)

card via hashtag.org · tokens via hashtag.space

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Uses / 7 days

Mastodon

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Accounts / 7 days

Mastodon

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Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-09 00:54 UTC

No measured public usage for #marcasite in the last 7 days. That is a real result, and a good one to know: this hashtag is wide open right now. We show a dash before we ever show a made-up number. Browse the trending index for tags with live measurements.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-10-09 00:54 UTC

No related tags with measured usage found for #marcasite.

Live pulse

measured · Mastodon tag timeline · fetched 2026-10-09 00:54 UTC

No recent public posts found for #marcasite on Mastodon. Nothing measured, so nothing shown.

What “marcasite” means

Wiktionary · Wikipedia

marcasite/ˈmɑːkəsʌɪt/

nounThe orthorhombic form of iron disulfide, FeS2, occurring as yellow crystals.

Full entry on Wiktionary →

The mineral marcasite, sometimes called "white iron pyrite", is iron sulfide (FeS2) with orthorhombic crystal structure. It is physically and crystallographically distinct from pyrite, which is iron sulfide with cubic crystal structure. Both structures contain the disulfide S22− ion, having a short bonding distance between the sulfur atoms. The structures differ in how these di-anions are arranged around the Fe2+ cations. Marcasite is lighter and more brittle than pyrite. Specimens of marcasite

“Marcasite” on Wikipedia (CC BY-SA) →

#marcasite across platforms

every network with a public tag surface

Follow #marcasite straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/marcasite