Home | About Us | Info | Buy | Sell | To Pay | Images | Library | Advice | Search | RSS Feeds | Site Map | Contact Us  

ADVICE WANTED!   July 31, 2002
www.findstone.com info@findstone.com

Ask any question, share your knowledge, or offer your services!

characteristics of specific others

specific granite, specific marble, other stones

Q 2304: In your response to a question that read "Does anyone have any particular do/don'ts when dealing with un-gauged Indian Slate? Dave, March 4." You responded "don't". Would you expand on that short answer please? I have also considered 12" gauged multicolored slate for kitchen, entry, hallway, but don't care to make an expensive mistake. What is your opinion of china white / gold quartzite? Thanks-much!! Leslie, July 26, 
R2: Leslie, The white/gold "Quartzite" is really a schist stone. It does have some Quartz in it, and is still a good material for exterior use. Only drawback, don't use next to the pool! I have used this material a lot in Hawaii, and have had some problems. Use a good penetrating sealer, and remember to keep the regular household cleaners off from it. A little simple green and warm water wont damage your stone, or your sealer. As for multi color interior, its what i have in my own home and I live it! Dawn, USA.
R1: Dear Leslie: Since I figured that you wouldn't care to make and expensive mistake (who 
would!!), I gave you all the answer that you needed to have. Indian slate is tremendously absorbent, and no impregnator / sealer under the sun will do a real good job at tackling that first problem. The second problem being that the material scratches like crazy and, being natural cleft finished, nobody could restore it. It sure doesn't belong in a kitchen to me!!
About the China white/china gold quartzite is concerned I have not a clue. Usually quartzite stone are extremely absorbent. Maurizio, USA 
Q 2295: I need the technical data for Indian Slate: Gold Green (Deoli Green). Lokesh, India, July 25, Reply
R1: Dear Lokesh, I know only some petrographic data of GOLDEN GREEN or DEOLI GREEN QUARTZITE from north India. The quartzites, as generally metamorphic rocks, are formed from sandstones during increasing temperature and pressure. The GOLDEN GREEN QUARTZITE contains minerals such as quartz, chlorite, micas and limonite (iron hydroxide). Some quartzites, including GOLDEN GREEN, are characterized by the presence of cleavages along which they can be easily split into thinner tiles (similar to slates). Planes of cleavage are folded to narrow parallel waves and they are covered by mixture of green chlorite and silver micas, which are locally weathered to golden limonite spots. Outside use of the stone is problematic because of slow but continual weathering of chlorite and micas. Size and shape of limonite spots can be changed. The quartzite is polishable. Daniel, Slovakia
Q 2278: I love your site but I swear, the more I read the more confused I get. I don't know if there is a limit to how many questions you'll so graciously answer from the same person though. I've read at least twice that Baltic Brown doesn't need sealed. Wiping a wet paper towel over my Baltic Brown tiles instantly darkens the tile. Water droplets DO stand on the tile and don't seem to "absorb". I'm thinking of the term "absorb" as a sponge would absorb water. From what I can tell, you are determining absorption by a piece of granite turning dark if liquid is spilled on it. I did the lemon test on the sample (it passed) but I believe it was probably sealed. My Baltic Brown has many pits/fissures that I can feel with my fingernail. If this "granite" isn't to be sealed, what does one do about food/liquids getting in there? I have been reading this site for over 8 hours and I'm still not sure whether or not to seal it! I chose this stone for it's color. It was a good companion to our Porcelain floor tile and it looked good with our cabinets AND we liked the colors Thank you, Monica, July 23, Reply
R2: Dear Monica: Baltic Brown may or may not need to be sealed. What I mean by that is that usually it's a very compact stone, but some batches are a little less compact than others and absorb -- even if so slightly -- oil. It's still a very limited degree of absorbency that can be easily controlled with a good-quality impregnator / sealer. In conclusion, even if I'm notoriously "lukewarm" about the sealing issue (despite the fact that I manufacture a darn good impregnator!!), in the case of Baltic Brown I concede that sealing could be considered a good bet.
The reason why the Wipes make the surface temporary dark is not due to the idea that the little liquid contained in them is getting absorbed, but to the fact that the surface is wet for a little while. Every wet surface is always somehow darker. On a side note, wipes are not advisable to clean natural stone. The chemicals contained in them may turn out to be too harsh either on the stone itself, or the sealer. 
Finally, about the pits and fissures they are a natural "trademark" of that particular "granite" (and many others, for that matter). They are there to stay and will not get filled by any impregnator / sealer. Maurizio, USA,
R1: Dear Monica: Baltic Brown is not a true geological granite, but for the intents and purposes of a kitchen countertop I consider it a better stone than granite. So, if you like the way it looks, go for it! Most of the times it doesn't need to be sealed, but it's one of those stones in the "twilight zone." Some batches do absorb even if so slightly, especially oil. As an extra precaution I would seal it.Maurizio, USA,
Thank you for your replies. I'm finally comfortable with the idea of sealing my Baltic Brown granite. Maurizio, thank you for clearing up the issue of exactly what you meant by absorption. I know that most everything takes on a darker appearance when wet but in the descriptions I read here it wasn't clear to me exactly what you meant when you would say "If you see that under the drops of lemon it develops very quickly dark spots, it means that it's a very absorbent stone..." Yes it turned dark but no the lemon juice or water didn't "disappear" (absorb) into the granite. There in laid my confusion. To clarify one other thing. I didn't use "Wipes" (as in baby wipes) on the granite. I said "Wiping a wet paper towel..." caused the granite to look darker. Trust me, I've been so afraid to use ANYTHING other than water on my granite so far. I'm waiting till I'm 100% clear on what to use and not to use ....this forum has been a GREAT help! Thanks again. Monica
Q 2224: I am doing an exterior suspended terrace project in NYC. A very hard "sandstone" called Cathedral" was recommended. It looks good, but it would seem that the nature of sandstone would suggest that it is soft and would absorb liquid and thus stain easily. Have you heard of this? Can it be sealed? with what? Thank You. Jack, July 15, Reply
R1: Dear Jack: It may be a very hard stone (and it is. But who cares, nobody is going to walk on it!), but it sure absorbs like a sponge! Your fear are certainly not groundless. A good-quality penetrating sealer may help, but only to a certain extent, and considering that's going to be outdoors in the NYC weather, it will be short lived, as well.
Of course, since there's no way to change the architect's (or decorator's) mind, just go ahead and install it. What do you care, unless you're the homeowner?! ... Maurizio, USA
A 2093: Do you have some information about the material Dakota Mahogany? John, June 20, Reply
R1: Dear John: It's a very good stone, very hard and very dense. Maurizio, USA
A 2077: Please advise regarding Espenrz Auldstone - Rosa Zarci. I am considering using this stone tile in my kitchen. Terry, June 17, Reply
R1: Dear Terry: Never heard of them! What are they supposed to be, "granite" or something? I learn of some "new" stone every day!! So, now we have "Espenrz Auldstone" and "Rosa Zarci" ... Quite interesting ... I'd love to know what the heck they are myself!!
A 1987: I am purchasing a new condominium and the developer has promised "pietra del cardoso" kitchen countertops. According to the info on your site, it is a grey color, however the sample I was shown had a greenish tone and matte finish. Is it posssible for pietra del cardoso to look green or is our developer being dishonest? Thanks, Tom, May 29, Reply
R1: Dear Tom: It is possible, Pietra Cardosa can have a greenish hue. I do feel sorry for you, however, and I sure hope you're not going to do a lot of cooking!! I sure wouldn't want that stone in my kitchen! Make sure that the stone is sealed several times over with a sealer designed for very absorbent stones, to minimize the likely hood of staining, due the high degree of absorbency of that particular stone. Maurizio, USA
A 1982: What is Jerusalem stone....Granite, Marble? Can it be used for a kitchen table top? Golia, May 29. Reply
R1: Dear Golia. It is limestone, and has all the associated properties of limestone. In particular, it is pH sensitive, and will react (etch) if exposed to anything acidic. JVC, USA
A 1974: I would like to buy Jaisalmer yellow for tabletops for outside. Is this a sandstone or a limestone? I like the colour, but is the quality also good? What is nicest for tabletops in garden, honed or polished glossy. Is it different in quality than Kotah Blue? All information is welcome. Marc, Belgium, May 27, Reply
R1: It is a limestone from India, though most think wrongly that it is a sandstone, FindStone
A 1883:Dr Hans, you recommended this magazine , article couldnot find it. Desperately need info on installation and care etc. of Jerusalem stone. Thanks, Russell, May 15. Reply
R1: Dear Russell, The magazine article in question documents the causes of failure of a Jerusalem limestone floor and demonstrates the investigative procedures carried out to arrive at a conclusion. It looks at the geological structure of the limestone (Ramon yellow) and some of the effects that can lead to failure. It must be stressed that it requires a certain set of circumstances for failure to occur and only in a small number of instances will all the circumstances eventuate. When they do it is generally terminal. It must also be stressed that it can happen with other limestones if these limestones have certain structures and if correct procedures for laying these natural stones are not followed. Just because a tiler or builder has laid ceramic tiles, porcelain tiles or terracotta tiles for 20 years does not mean that he is qualified to lay natural stone tiles in all situations! Natural stone products demand some experience and knowledge! The reasons why we are getting a rash of failures is also due to the extra availability of natural stone to the average homeowner and builder and to the lack of information and sometimes misinformation provided by the suppliers and importers of some of these products. I had better stop here - I am starting to sound like Maurizio! Dr. Hans, Australia  

A 1740: Hi, We are thinking of using Gold Jerusalem Limestone in our bathroom, as flooring, inside the shower and for the countertop. Would anyone please tell us if this material is hard enough for the bathroom. Charluddy, April 20. Reply

R3: No problem. We've used it extensively in a new hotel in Pietermaritzburg / South Africa with great success. Thomas, South Africa.
R2: I don't think it is appropriate for the shower application. With a proper mindset and attention to ongoing care it will be fine for the other applications. Regards, Steven, USA
R1: I would refer you to an article written by Dr Hans here, that appeared in a March 2002 issue of a stone magazine which addresses the issues of Jerusalem Limestone, before you use the product. cheers, Libi, Australia. 
A 1589: I'm looking for information on a type of brown sandstone commonly known
as "Tennessee Crab Orchard". Where is this stone quarried, what are its characteristics, uses, availability, etc.? Thanks in advance. Doug, March 25. Reply
R1: Doug. Tennessee Crab Orchard is quarried in Tennessee, and is available here in Texas through stone yards in several major cities, so I assume the same would be true for its availability in other states also. It is quite pricey here, but then there are freight costs to consider. It is a rather dense and hard stone, usually with a nice range of color in the brown to yellow to red range, and comes in large flags for patio use, and a chopped (split face) stone with face heights up to 6 inches or so for use in retaining walls and building veneers. Its a pretty stone, but it is expensive compared to the stone we have to choose from locally. JVC, USA.
A 1588: I just read your response re the use of Pietra Cardosa Sandstone for kitchen countertops. Do I understand correctly that you are saying that this material will not hold up as well as granite because it will "etch" more seriously?
I am not planning to polish this stone, but to leave it "natural" with just a sealer. I hope that it will "age" nicely and pick up it's own patina and character over the years. Would you change your mind/recommendations in this case?
I have read elsewhere (in several magazines and elsewhere ) that this particular form of Pietra sandstone is "tougher" than granite, that is, more forgiving as to stains and scratches. Can you give me more info.? Thanks so much. Jami, March 25. Reply
R1: Dear Jamy: To the best of my knowledge Pietra Cardosa does not etch (it's a 100% silicate rock). It's porous, all right, but certain "granites" are much more porous than that. If you don't mind the "changes" of appearance the stone will go through as it ages (most American do seem to mind!), then you should be all right, after proper sealing. Maurizio, USA.
A 1394: I'm interested in finding a Los Angeles or Orange County company that sells Basaltina Granite. Also, would like to know if it is appropriate for a kitchen countertop. Cathy, Jan 31. Reply
R1: Dear Cathy: "Basaltina" is not a granite by a long shot. In Fact, it doesn't even pretend to be one. It's a volcanic stone called Basalt (hence the name Basaltina) and is quarried in the proximity of Rome, Italy. 
That said, you do NOT want to find out if anybody in Orange County, CA carries it. In fact, you want to stay as far away from it as possible (as a material for kitchen countertop). Too darn absorbent! No sealer can do a perfect and decently lasting job while dealing with such a degree of absorbency. Maurizio, USA.
A 1178: We are looking for information on Ceasar stone. Can you help us? Donna, Nov 10.
R2: Dear Donna, Caesar stone is quartz-based artificial stone from Israel. Daniel, Slovakia
R1: Donna, Caesar stone is an engineered quartz product. It has the hardness of granite. It has more flexibility than granite. It is not necessarily as shiny or heat resistant as granite. It is less porous. It is 10% less expensive than granite. Best regards, Steven, USA

A 1066: I am a supplier from Singapore and looking for the specification for Moca Creme limestone, and as well as the description of the marble. I hope U could help me, because I am trying to get this material specified in a project. Your reply would be greatly appreciated. Urgent Please. Thank You, Regards Tan Yen Chuan, Aug 15. Contact 

R1: Stone Marketing Name: Moca Creme
Alias names: Classic/Relvinha 
Test Unit Results:
Compression Breaking load kg/cm 2760.00
Compression Breaking load after freezing kg/cm 2796.00
Bending Strength kg/cm 2176.00
Volumetric Weight kg/cm 22433.00
Water absorption % 3.60
Apparent Porosity % % 8.92
Coefficient of Thermal Linear Expansitivity 10^6 per deg C 3.40
Abrasion Test MM 4.20
Impact test, minimum fall CM 32.50

SIO2O             0.03
Al2O3                  0
Fe2O3             0.12
MnO                   0
CaO              54.85
MgO               0.44
Na2O              0.07
K2O               0.07
TiO2                  0
P.R              43.49
MACROSCOPIC DESCRIPTION White cream limestone, calciclastic to oolitic, scarcely bioclastic
PETROGRAPHIC ANALYSIS Pelbiomicrosparite (Calciclastic limestone)

Burzin, India Contact


Comments? Complaints? Compliments? info@findstone.com The views expressed in this section are not of FindStone.