corundum - 2025 ACF Fall - Buzzpoints App

Question

The Verneuil (“ver-NOY”) method is primarily used to produce synthetic gemstones of this mineral. For 10 points each:

[10m] Name this crystalline form of aluminum oxide. Emery, a rock containing this mineral, is often used as an abrasive since this mineral rates a 9 on the Mohs hardness scale.

ANSWER: corundum

[10e] Gemstones of corundum include sapphire, whose blue color is caused by impurities of iron and this element. This strong, light transition metal has atomic number 22 and is common in the aerospace industry.

ANSWER: titanium [or Ti]

[10h] Corundum has the same crystal structure as this iron-containing mineral and is therefore considered part of this mineral’s “group.” Ochre contains large amounts of this mineral, whose chemical formula is Fe2O3.

ANSWER: hematite [accept hematite group]

<Editors, Other Science>

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Summary


Northern California	Main	Y	4	17.50	75%	50%	50%
Eastern Canada (1)	Main	Y	4	5.00	50%	0%	0%
Eastern Canada (2)	Main	Y	9	6.67	33%	33%	0%
Florida	Main	Y	4	2.50	0%	25%	0%
Great Lakes	Main	Y	10	14.00	60%	70%	10%
Lower Mid-Atlantic	Main	Y	9	10.00	44%	44%	11%
Upper Mid-Atlantic	Main	Y	9	8.89	44%	44%	0%
Midwest	Main	Y	9	16.67	89%	56%	22%
North	Main	Y	4	12.50	25%	50%	50%
Northeast	Main	Y	11	6.36	36%	27%	0%
South Central	Main	Y	6	3.33	0%	33%	0%
Southeast	Main	Y	12	11.67	58%	50%	8%
UK (North)	UK	Y	5	18.00	80%	60%	40%
UK (South)	UK	Y	8	12.50	75%	25%	25%
Upstate NY	Main	Y	5	6.00	60%	0%	0%

Data


UCSC	Berkeley Boss Bandit	10	10	0	20
Berkeley Archer Queen	Berkeley Little Prince	10	0	10	20
Stanford B	Berkeley Mighty Miner	0	10	0	10
Berkeley Skeleton King	Stanford A	0	10	10	20
Carleton A	McGill B	0	0	0	0
McGill E	McGill A	0	0	0	0
Ottawa B	McGill C	0	10	0	10
Ottawa A	Carleton B	0	10	0	10
Toronto E	Brock A	10	0	0	10
Toronto C	Toronto F	10	10	0	20
Toronto B	Toronto I	0	10	0	10
Waterloo A	Queen's A	0	10	0	10
Florida State A	Florida A	10	0	0	10
Florida B	ERAU Daytona A	0	0	0	0
UCF A	Florida Tech A	0	0	0	0
South Florida A	Florida Tech B	0	0	0	0
Louisville C	CWRU C	10	0	0	10
Louisville B	Kentucky	10	10	0	20
CWRU D	Louisville D	10	10	0	20
Michigan A	Ohio State B	10	10	0	20
Michigan B	Ohio State C	10	10	0	20
Pittsburgh	Michigan State C	0	0	0	0
Louisville A	Michigan State D	10	0	0	10
Ohio State D	Michigan State A	0	0	0	0
Michigan State B	WVU A	0	10	10	20
CWRU A	WVU B	10	10	0	20
Waterloo B	Guelph A	0	0	0	0
Waterloo C	McMaster A	0	0	0	0
Toronto D	McMaster C	0	0	0	0
Toronto G	McMaster B	10	0	0	10
Toronto A	Toronto H	0	0	0	0
William & Mary A	Duke A	10	0	0	10
UNC B	JMU B	0	10	0	10
Virginia Tech A	Liberty A	10	10	0	20
Liberty B	Virginia Tech C	0	0	0	0
Virginia A	Liberty C	10	10	10	30
Virginia Tech B	NCSU B	0	0	0	0
Tusculum A	UNC A	0	0	0	0
JMU A	UNC C	0	0	0	0
NCSU A	William & Mary B	10	10	0	20
George Mason A	Columbia A	0	0	0	0
Lehigh A	Columbia B	0	10	0	10
Maryland C	Rowan	0	0	0	0
George Mason B	NYU B	0	0	0	0
Penn	NYU C	10	10	0	20
Maryland B	Rutgers A	10	10	0	20
NYU A	Stony Brook	10	10	0	20
Rutgers B	Vassar A	0	0	0	0
Chicago B	Iowa A	10	10	10	30
Purdue B	Illinois Champaign	10	10	0	20
Chicago A	Illinois Orange	10	10	10	30
Purdue A	Illinois Urbana	10	10	0	20
Rose-Hulman A	Indiana A	0	10	0	10
WashU Grizzlers	Purdue C	0	10	0	10
Iowa B	William Woods University A	0	0	0	0
Illinois Blue	Purdue D	10	10	0	20
Illinois Canada	WashU Grolars	0	10	0	10
Maryland A	George Mason C	10	0	0	10
St. Thomas	Macalester	10	10	10	30
Wisconsin A	Michigan Tech	10	0	10	20
Wisconsin B	Minnesota	0	0	0	0
Iowa State	Wisconsin C	0	0	0	0
Dartmouth B	Brandeis Bach	10	10	0	20
Brandeis Mozart	Brown B	0	0	0	0
Brown A	Williams C	0	10	0	10
Dartmouth C	Amherst A	0	0	0	0
Williams A	Harvard	10	0	0	10
Boston College B	MIT B	0	0	0	0
MIT A	Tufts A	10	10	0	20
Boston University A	Tufts C	0	0	0	0
UConn A	Boston University B	0	10	0	10
Vermont B	Dartmouth A	0	0	0	0
Williams B	Vermont A	0	0	0	0
Murray State College A	Nebraska C	10	0	0	10
Murray State College B	Central Oklahoma B	0	0	0	0
Nebraska A	Kansas State A	10	0	0	10
Kansas State B	Nebraska B	0	0	0	0
Tulsa A	Oklahoma	0	0	0	0
Rose State	Central Oklahoma A	0	0	0	0
Clemson C	Auburn C	0	0	0	0
Chipola College	Tennessee A	10	10	0	20
Clemson B	Vanderbilt A	0	10	10	20
Emory A	Montevallo	0	10	0	10
Vanderbilt C	Georgia A	10	0	0	10
Alabama A	Georgia Tech A	10	0	0	10
Georgia Tech B	Georgia Tech D	10	10	0	20
Georgia Tech C	Sewanne	0	10	0	10
Auburn A	Georgia Tech E	10	10	0	20
Georgia Tech F	Auburn B	0	0	0	0
Vanderbilt B	Mississippi State A	0	0	0	0
Clemson A	Tennessee B	10	10	0	20
Durham B	Edinburgh A	10	10	0	20
Durham C	Edinburgh D	0	10	10	20
Durham A	Edinburgh B	0	10	10	20
Durham D	Edinburgh C	10	10	0	20
Sheffield B	York	10	0	0	10
Cambridge A	Birmingham	10	10	0	20
Cambridge B	Bristol	10	0	10	20
Cambridge D	Warwick	0	10	10	20
Imperial B	Cambridge E	0	10	0	10
LSE	Imperial A	0	10	0	10
Cardiff	Imperial C	0	10	0	10
Imperial D	Oxford	0	0	0	0
Cornell A	Binghamton B	0	10	0	10
Binghamton C	RIT B	0	0	0	0
Cornell D	Rochester	0	10	0	10
Binghamton A	Cornell B	0	10	0	10
ESF	Cornell C	0	0	0	0
Southampton	Cambridge C	0	10	0	10